Podcasts about 67p churyumov gerasimenko

I dagens afsnit følger vi op på forrige afsnit, og taler om potentielt liv på exoplaneter. Og så har vi tid til en række andre spændende emner, som planet X/planet nummer 9, rumarkitektur, nedfaldende rumskrald og meget mere. Herunder at jorden har fået en sort boks!Her er Karina's notater til dagens afnsiot:1:Tegn på liv på Exoplanet K2-18b (?)K2-18b er en Exoplanet der kredser om stjernen K2-18, som er en rød dværg stjerne (124 lysår væk i stjernebilledet Løven). Den blev opdaget fordi den passerer foran sin stjerne i vores synsvinkel. K2-18b er i den beboelige zone omkring stjernen med et omløb på 33 dage. Den får cirka lige så meget lys fra sin stjerne som Jorden får fra solen. K2-18b har en radius der er 2.6 gange så stor som jordens radius og 8.6 gange tungere. Den er den første exoplanet som vi har undersøgt atmosfæren af. Det kann man ved at se på dens stjernes lys når det passerer igennem planetens atmosfære.Tidligere observationer med først Rumteleskopet Hubble og senere James Webb havde allerede afsløret, at K2-18 b har en atmosfære, der bl.a. indeholder vanddamp samt de kulstofholdige molekyler kuldioxid og metan – sidstnævnte populært kaldet naturgas. Ud fra disse resultater havde forskerne vurderet, at K2-18 b er en såkaldt hycean-planet – en planet med en atmosfære der er rig på hydrogen (brint) og har et globalt ocean af vand. Allerede de tidligere observationer med James Webb havde antydet forekomsten af DMS i atmosfæren på K2-18 b, men først med yderligere observationer er forskerne nu mere sikre i deres sag. De påpeger dog selv nødvendigheden af at foretage yderligere observationer med James Webb for at forekomsten af DMS og/eller DMDS kan definitivt bekræftes.DMS / DMDS:Det handler konkret om svovlforbindelserne dimethylsulfid (DMS) og/eller dimethyldisulfid (DMDS). Her på Jorden frembringes DMS og DMDS kun af levende organismer – primært mikrober som planteplankton i havet. Det er dog vigtigt at sige, at det på det foreliggende grundlag ikke kan bekræftes, at gasserne i K2-18 bs atmosfære er af biologisk oprindelse.Abiotisk oprindelse er også mulig!***** OPDATERING d. 3. maj 2025:En uafhængig analyse af James Webb-observationerne af K2-18 b ser ikke klare tegn på svovlgasserne DMS og/eller DMDS i planetens atmosfære. Yderligere observationer med James Webb er nødvendige for at afgøre om gasserne, der kan ses som et tegn på liv (en såkaldt biosignatur), er til stede på K2-18 b.Kilde:https://arxiv.org/html/2504.15916v1#bib.bib7 En anden dybere artikel:https://bigthink.com/starts-with-a-bang/evidence-biosignatures-k2-18b-flimsy/The problem with the detection:The “detection” of DMS in the near-infrared portion of the spectrum was very, very flimsy: at only 1-sigma significance, which means there's greater than a ~30% chance that the detection is a fluke. In all sub-field of physics and astronomy, a “1-sigma detection” is known as a non-detection; there is no meaningful signal seen here.While DMS on Earth may primarily arise from biological production mechanisms, it is found all throughout the Universe and, in those environments, is produced entirely by non-biological means. It's been found in the interstellar medium, including in the galactic center's large molecular cloud G+0.693-0.027. It's been produced abiotically in the laboratory right here on Earth (including since 1995) by simple processes, and can be made photochemically elsewhere in the Universe. And it's been found on comets as well, including on the famous comet 67P/Churyumov-Gerasimenko, which was the target of ESA's Rosetta mission.Hvad kan man egentlig med JWST?En artikel har undersøgt JWST's nøjagtighed og mener ikke at det teleskop er i stand til at give definitivt bevis for noget som dette. “Characterizing rocky or sub-Neptune-size exoplanets with JWST is an intricate task, and moves us away from the notion of finding a definitive “silver bullet” biosignature gas. Indeed, JWST results necessitate us to allow “parallel interpretations” that will perhaps not be resolved until the next generation of observatories.” https://arxiv.org/abs/2504.12946--------------------------------------------2: Hvornår er det okay at trykke på 'BIG NEWS' knappen?Back in 2021, the astrobiology community held a workshop on standards of evidence for biosignatures, which led to a community report discussing responsible standards of evidence and quantifying seven different levels of confidence for announcing biosignatures, with the lowest-confidence levels going to detections that cannot discriminate between different scenarios and mid-confidence levels going to definitive detections that cannot rule out abiotic pathways. To announce “we've found a biosignature” would require multiple, independent, unambiguous signatures of molecules that cannot be produced abiotically at all.Kilde: https://arxiv.org/abs/2210.1429317. April: I en Astronom Facebook gruppe:" This is an appeal. I am very sorry to bring this up in these difficult times, but I think that this latest astronomy news on extraterrestrial life goes very far beyond what in my opinion is responsible science communication. You could argue that this generates excitement in the public that is very much needed, but I think it is very damaging in the long run. Our colleagues from other fields will not take us serious anymore if we go on like this. We are doing fantastic stuff, also the group that has pushed this news. We don't need this, also not now."Og så blev der ellers diskuteret!Hvad jeg mener: Hvis man får opmærksomhed får man funding. Men når man overvurderer et resultat, så skader det troværdigheden. ----------------------------------------------------------------------------------3: Planet X eller Planet 9.Vi har måske fået vores første rigtige glimt af Planet Nine! Eksperter siger, at et mystisk objekt, som netop er blevet opdaget i to infrarøde himmelundersøgelser, er det hidtil stærkeste bevis for Planet 9. Planet 9 blev første gang foreslået i 2016 for at forklare de mærkelige baner for islegemer uden for Neptun, og man mener, at den er en massiv, fjern verden - måske mere end ti gange Jordens masse - som lurer langt uden for Pluto. Nu har astronomer under ledelse af Terry Long Phan fra National Tsing Hua University identificeret et svagt objekt i data fra rumteleskoperne IRAS (1983) og AKARI (2006), som ser ud til at have bevæget sig lige akkurat nok til at antyde, at den kredser om solen fra omkring 700 astronomiske enheder væk - ca. 65 milliarder kilometer. Baseret på dens infrarøde lysstyrke ville denne kandidat være mere massiv end Neptun og kan befinde sig i et vildt langstrakt kredsløb, der tager tusindvis af år at fuldføre.Selv om objektets identitet endnu ikke er bekræftet, skiller denne opdagelse sig ud, fordi den er synlig i begge datasæt - noget, som tidligere Planet Nine-kandidater manglede. Der er planlagt opfølgende observationer ved hjælp af kraftige teleskoper som Dark Energy Camera i Chile. Hvis den er ægte, kan Planet Nine give en hidtil uset indsigt i vores solsystems tidlige dage, herunder muligheden for, at den blev dannet nær de gigantiske planeter og blev kastet udad - eller blev indfanget fra et helt andet stjernesystem. Med næste generations observatorier som Vera C. Rubin-observatoriet og Nancy Grace Roman Space Telescope, der kommer online, siger astronomerne, at Planet Nines skjulesteder hurtigt forsvinder.https://arxiv.org/pdf/2504.17288https://videnskab.dk/rummet/hvor-taet-er-vi-paa-at-finde-planet-9/Bedste billede er sandkorn på en højtaler, der lægger sig i mønstre alt efter resonans frekvens af lyden der bliver afspillet. På samme måde hiver og trækker de store ydre planeter i de mindre objekter (planeter, asteroider, kometer) i solsystemet. Disse resonanser kan have afgørende for dannelse af liv som Uffe var inde på. De kan nemlig være afgørende for hvornår det sidste store bombardament skete.

Om några år ska en ny rymdsond ut i solsystemet för att möta upp en ännu okänd komet. Intergalaktiskt pratar rymdstenar för att ta reda på vad forskarna är på jakt efter. Kometer är mindre himlakroppar som kretsar runt solen. De kan ses som frysta rester från när solsystemet bildades, och är således intressanta för att bredda mänsklighetens kunskap. Gabriella Stenberg Wieser är forskare vid Institutet för rymdfysik i Kiruna och även återkommande panelist i tv-programmet Fråga Lund. Nu gör hon sin debut i Intergalaktiskt för att prata om kometer, rymdsonden Rosetta och den kommande rymdsonden Comet Interceptor. För Viktor Krylmark och Bill Burrau berättar hon om Rosettas besök vid kometen 67P/Churyumov–Gerasimenko. Rosetta var en europeisk rymdsond som lämnade jorden i mars 2004. Hosted on Acast. See acast.com/privacy for more information.

Almost everything you could want to know about ESA's Rosetta-Philae mission to comet 67P/Churyumov–Gerasimenko.

Waar komt al dat water op aarde toch vandaan? Daar waren al wel ideeën over, maar die werden weer in de wielen gereden door recente metingen van het Rosetta ruimtevaartuig. Maar gelukkig voor ons is dat probleem onlangs opgelost.Droogte-monitor van Rijkswaterstaat:https://waterberichtgeving.rws.nl/owb/droogtemonitorTerechte zorgen of er nog water uit onze kraan komt:https://www.vewin.nl/blog/terechte-zorgen-of-er-nog-water-uit-onze-kraan-komt/Comets probably delivered Earth its water billions of years ago, new study reveals:https://www.space.com/the-universe/earth/comets-probably-delivered-earth-its-water-long-ago-new-study-revealsNASA-Led Team Links Comet Water to Earth's Oceans:https://science.nasa.gov/solar-system/comets/nasa-led-team-links-comet-water-to-earths-oceans/A nearly terrestrial D/H for comet 67P/Churyumov-Gerasimenko: https://www.science.org/doi/10.1126/sciadv.adp2191De Zimmerman en Space podcast is gelicenseerd onder een Creative Commons CC0 1.0 licentie.http://creativecommons.org/publicdomain/zero/1.0

Astronomy Daily - The Podcast: S03E215Welcome to Astronomy Daily, your Daily dose of space news and astronomical insights. I'm your host, Steve, bringing you the latest stories from the cosmos. Today, we delve into the fascinating world of space exploration, from cognitive studies of astronauts to the legacy of a historic comet mission.Highlights:- Astronaut Cognitive Performance: Explore NASA's study on cognitive abilities in astronauts during six-month missions aboard the International Space Station. Discover how factors like microgravity and high-stress environments affect cognitive domains such as processing speed and attention, with findings showing no significant impairment or brain damage.- China's Manned Lunar Mission: Uncover China's ambitious plans for a manned lunar landing by 2030. Learn about the mission's key components, including the lunar rover and lander, and the advancements in lunar science and exploration technology.- Philae's Comet Legacy: Celebrate the 10th anniversary of the Philae lander's historic touchdown on Comet 67P. Relive the mission's groundbreaking discoveries, from surface characteristics to organic compounds, and its impact on future comet and asteroid exploration.- ESA's Comet and Asteroid Missions: Discover the European Space Agency's ongoing and future missions, including the HERA mission to survey Dimorphos and the Ramses mission to accompany Apophis in 2029. Learn how these missions build on the success of Rusty and Philae.For more cosmic updates, visit our website at astronomydaily.io. Sign up for our free Daily newsletter to stay informed on all things space. Join our community on social media by searching for #AstroDailyPod on Facebook, X, YouTubeMusic, and Tumblr. Share your thoughts and connect with fellow space enthusiasts.Thank you for tuning in. This is Steve & Hallie signing off. Until next time, keep looking up and stay curious about the wonders of our universe.Become a supporter of this podcast: https://www.spreaker.com/podcast/astronomy-daily-the-podcast--5648921/support.✍️ Episode ReferencesEuropean Space Agency (ESA)[https://www.esa.int/](https://www.esa.int/)NASA's Behavioral Health and Performance Laboratory[https://www.nasa.gov/](https://www.nasa.gov/)Frontiers in Physiology[https://www.frontiersin.org/journals/physiology](https://www.frontiersin.org/journals/physiology)China Manned Space Agency (CMSA)[http://en.cmse.gov.cn/](http://en.cmse.gov.cn/)Human Space Symposium[https://www.humanspacesymposium.org/](https://www.humanspacesymposium.org/)International Space Station (ISS)[https://www.nasa.gov/mission_pages/station/main/index.html](https://www.nasa.gov/mission_pages/station/main/index.html)Rusty Mission[https://www.esa.int/Science_Exploration/Space_Science/Rosetta](https://www.esa.int/Science_Exploration/Space_Science/Rosetta)Comet 67P/Churyumov-Gerasimenko[https://en.wikipedia.org/wiki/67P/Churyumov–Gerasimenko](https://en.wikipedia.org/wiki/67P/Churyumov–Gerasimenko)

Erfahre ob Kometen Leben und Wasser auf die Erde gebracht haben, was die Comet Interceptor Mission ist, wie Kometen uns bei der Suche nach anderem Leben helfen, was Dimethylsulfid ist und warum Nora eine riesen Debatte darum losgetreten hat, ob es Alkohol auf Kometen gibt und noch vieles mehr! Nora ist Kometenforscherin an der Uni Bern in der Abteilung Weltraumforschung und Planetologie. Du findest Nora hier: https://www.norahaenni.ch/ Auf LinkedIn: https://www.linkedin.com/in/nora-h%C3%A4nni-7b4a061bb/ Auf Instagram: https://www.instagram.com/norahaenni?igsh=MWE4MnQ1eTVhejJrYg%3D%3D Auf X: https://x.com/i/flow/login?redirect_after_login=%2FNoraHaenni PS: Der Podcast ist eine Herzensangelegenheit und lebt durch dich! Teil den Folgenlink deshalb mit jemandem und inspiriere ihn! Weitere Themen über die wir geredet haben waren: Kometen, Kometenforschung, Moleküle, Alkohol auf Kometen, makromolekulare Strukturen, Rosetta Mission, 67P/Churyumov-Gerasimenko, Asteroiden, Comet Interceptor, Oortsche Wolke, Kuiper Gürtel, wo kommen Kometen her, was verraten sie uns, Interstellare Objekte, Eismonde, Exoplaneten, Leben auf anderen Planeten, Außerirdische, Aliens, Suche nach Leben, abiotisch, biotisch, Dimethylsulfid, ESA, NASA.

Le vaisseau spatial Carl Sagan s'approche de la comète 67P/Churyumov-Gerasimenko, surnommée Tchouri. Explorez les mystères des comètes, ces objets glacés venant des confins du système solaire, et découvrez comment leur étude peut nous éclairer sur les origines de notre planète et de l'eau sur Terre. Immersion sonore : ImportanteVers l'infiniProduction : Aurélien Hérault, Damien Maric, Chloé LuizardChargée de production : Agathe LedeinAuteur : Sébastien CarassouComédienne : Julie DumasStudio : Load StudioHabillage Sonore : Illustrason Hébergé par Acast. Visitez acast.com/privacy pour plus d'informations.

你若是徛 tī 週期性彗星 67P/Churyumov-Gerasimenko ê 山壁頂懸，並袂去予這場暴風雪擋咧。Rosetta 太空船 tī 2016 年 6 月踅這粒彗星 ê 時陣，伊 ê 狹視角 kha-mé-lah 就 tī 彗星表面 頂懸 附近，紀錄著這寡 tī 視野內底看起來敢若是咧落雪 ê 塗粉 kah 冰粒。有一寡 tī 影像內底較光 ê 光斑，可能是因為高能紮電粒子 抑是 宇宙線 去舂著 kha-mé-lah。有一寡是 tī 大隻狗星座（大犬座）方向 實密 ê 背景星。影片 內底 ê 背景星較好揣，因為 in ê 光巡 是 ùi 頂懸到下底。這支精彩 ê 影片是 Rosetta 太空船 tiàm 離 彗核 13 公里遠 ê 所在，kā 25 分鐘內翕 ê 33 張 連紲影像 合成 ê 影片。2016 年 9 月 ê 時陣，Rosetta 太空船完成伊最後 ê 任務了後，成功控制伊家己去挵 彗星 67P。彗核就變做是 Rosetta 太空船 上落尾安息 ê 所在。 ——— 這是 NASA Astronomy Picture of the Day ê 台語文 podcast 原文版：https://apod.nasa.gov/ 台文版：https://apod.tw/ 今仔日 ê 文章： https://apod.tw/daily/20240106/ 影像：ESA, Rosetta, MPS, OSIRIS; UPD/LAM/IAA/SSO/INTA/UPM/DASP/IDA 動畫：Jacint Roger Perez 音樂：P!SCO - 鼎鼎 聲優：阿錕 翻譯：An-Li Tsai (NSYSU) 原文：https://apod.nasa.gov/apod/ap240106.html Powered by Firstory Hosting

Voici un nouvel épisode de notre format « Flash » ! Le principe est toujours le même : 2 sujets que l'on a préparés avant de vous en parler et qui servent de base pour expliquer des faits supplémentaires sur l'Univers. Bon... exceptionnellement là pour cet épisode, il y a 4 sujets : 2 principaux et 2 rapidement abordés. C'est une présentation plus informelle que dans les actes, et l'occasion de discussion entre les deux passionnés derrière ASpaceMR qu'est le duo Redscape & Phil_Goud.Il y aura parfois des références aux actes déjà publiés, mais il y aura surtout des notions supplémentaires que nous n'avons pas eu l'occasion d'aborder. Cette semaine, on oublie les tournevis et on rebondit sur des comètes, et oui, même à la NASA on peut se retrouver aussi con que de devant un meuble IKEA ou à l'ESA avoir des trucs qui foirent au mauvais moment, alors il faut savoir s'adapter !Et puis en Europe, on est à poil : On va chercher du SpaceX pour lancer des satellites de notre constellation Galileo. Alors, cette Ariane 6, ça arrive ? Rosetta & Philae Images du live (cliquez pour agrandir) : Clichés de 67P/Churyumov-Gerasimenko sous différents angles Cliché de Rosetta avec 67P en arrière plan Site d'atterrissage de Philae Taux de deutérium sur Terre, sur 67P et sur différents corps spatiaux Liens : Fiche de la mission sur le site du CNES L'aventure merveilleuse de Rosetta et Philae (film d'animation de l'ESA) Communiqué sur les molécules détectées Ariane 6, l'arianesiènne. Images du live (cliquez pour agrandir) : Vue d'artiste de la séparation des boosters d'une Ariane 64 Chiffres clefs d'Ariane 6 Comparaisons entre Ariane 62, 64 et 5 Essai au sol d'Ariane 6 Liens : La page de présentation d'Ariane 6 par l'ESA La présentation du programme Ariane 6 et l'actualité relatif au(x) lanceur(s) L'accord financier scellé le Mardi 07 Novembre pour la continuité de l'exploitation du lanceur EUCLID, un peu plus près des étoiles. Liens: L'article de l'ESA (agence à l'origine du projet) consacré aux photos ci-dessus.

Sub-mm mm optical properties of real protoplanetary matter derived from Rosetta MIRO observations of comet 67P by Johanna Bürger et al. on Thursday 24 November Optical properties are required for the correct understanding and modelling of protoplanetary and debris discs. By assuming that comets are the most pristine bodies in the solar system, our goal is to derive optical constants of real protoplanetary material. We determine the complex index of refraction of the near-surface material of comet 67P/Churyumov-Gerasimenko by fitting the sub-millimetre/millimetre observations of the thermal emission of the comet's sub-surface made by the Microwave Instrument for the Rosetta Orbiter (MIRO) with synthetic temperatures derived from a thermophysical model and radiative-transfer models. According to the two major formation scenarios of comets, we model the sub-surface layers to consist of pebbles as well as of homogeneously packed dust grains. In the case of a homogeneous dusty surface material, we find a solution for the length-absorption coefficient of $alpha approx 0.22~mathrm{cm^{-1}}$ for a wavelength of 1.594 mm and $alpha geq 3.84~mathrm{cm^{-1}}$ for a wavelength of 0.533 mm and a constant thermal conductivity of $0.006~mathrm{Wm^{-1}K^{-1}}$. For the pebble scenario, we find for the pebbles and a wavelength of 1.594 mm a complex refractive index of $n = (1.074 - 1.256) + mathrm{i} , (2.580 - 7.431)cdot 10^{-3}$ for pebble radii between 1 mm and 6 mm. Taking into account other constraints, our results point towards a pebble makeup of the cometary sub-surface with pebble radii between 3 mm and 6 mm. The derived real part of the refractive index is used to constrain the composition of the pebbles and their volume filling factor. The optical and physical properties are discussed in the context of protoplanetary and debris disc observations. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2211.12807v1

Sub-mm mm optical properties of real protoplanetary matter derived from Rosetta MIRO observations of comet 67P by Johanna Bürger et al. on Thursday 24 November Optical properties are required for the correct understanding and modelling of protoplanetary and debris discs. By assuming that comets are the most pristine bodies in the solar system, our goal is to derive optical constants of real protoplanetary material. We determine the complex index of refraction of the near-surface material of comet 67P/Churyumov-Gerasimenko by fitting the sub-millimetre/millimetre observations of the thermal emission of the comet's sub-surface made by the Microwave Instrument for the Rosetta Orbiter (MIRO) with synthetic temperatures derived from a thermophysical model and radiative-transfer models. According to the two major formation scenarios of comets, we model the sub-surface layers to consist of pebbles as well as of homogeneously packed dust grains. In the case of a homogeneous dusty surface material, we find a solution for the length-absorption coefficient of $alpha approx 0.22~mathrm{cm^{-1}}$ for a wavelength of 1.594 mm and $alpha geq 3.84~mathrm{cm^{-1}}$ for a wavelength of 0.533 mm and a constant thermal conductivity of $0.006~mathrm{Wm^{-1}K^{-1}}$. For the pebble scenario, we find for the pebbles and a wavelength of 1.594 mm a complex refractive index of $n = (1.074 - 1.256) + mathrm{i} , (2.580 - 7.431)cdot 10^{-3}$ for pebble radii between 1 mm and 6 mm. Taking into account other constraints, our results point towards a pebble makeup of the cometary sub-surface with pebble radii between 3 mm and 6 mm. The derived real part of the refractive index is used to constrain the composition of the pebbles and their volume filling factor. The optical and physical properties are discussed in the context of protoplanetary and debris disc observations. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2211.12807v1

Sub-mm mm optical properties of real protoplanetary matter derived from Rosetta MIRO observations of comet 67P by Johanna Bürger et al. on Wednesday 23 November Optical properties are required for the correct understanding and modelling of protoplanetary and debris discs. By assuming that comets are the most pristine bodies in the solar system, our goal is to derive optical constants of real protoplanetary material. We determine the complex index of refraction of the near-surface material of comet 67P/Churyumov-Gerasimenko by fitting the sub-millimetre/millimetre observations of the thermal emission of the comet's sub-surface made by the Microwave Instrument for the Rosetta Orbiter (MIRO) with synthetic temperatures derived from a thermophysical model and radiative-transfer models. According to the two major formation scenarios of comets, we model the sub-surface layers to consist of pebbles as well as of homogeneously packed dust grains. In the case of a homogeneous dusty surface material, we find a solution for the length-absorption coefficient of $alpha approx 0.22~mathrm{cm^{-1}}$ for a wavelength of 1.594 mm and $alpha geq 3.84~mathrm{cm^{-1}}$ for a wavelength of 0.533 mm and a constant thermal conductivity of $0.006~mathrm{Wm^{-1}K^{-1}}$. For the pebble scenario, we find for the pebbles and a wavelength of 1.594 mm a complex refractive index of $n = (1.074 - 1.256) + mathrm{i} , (2.580 - 7.431)cdot 10^{-3}$ for pebble radii between 1 mm and 6 mm. Taking into account other constraints, our results point towards a pebble makeup of the cometary sub-surface with pebble radii between 3 mm and 6 mm. The derived real part of the refractive index is used to constrain the composition of the pebbles and their volume filling factor. The optical and physical properties are discussed in the context of protoplanetary and debris disc observations. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2211.12807v1

Sub-mm mm optical properties of real protoplanetary matter derived from Rosetta MIRO observations of comet 67P by Johanna Bürger et al. on Wednesday 23 November Optical properties are required for the correct understanding and modelling of protoplanetary and debris discs. By assuming that comets are the most pristine bodies in the solar system, our goal is to derive optical constants of real protoplanetary material. We determine the complex index of refraction of the near-surface material of comet 67P/Churyumov-Gerasimenko by fitting the sub-millimetre/millimetre observations of the thermal emission of the comet's sub-surface made by the Microwave Instrument for the Rosetta Orbiter (MIRO) with synthetic temperatures derived from a thermophysical model and radiative-transfer models. According to the two major formation scenarios of comets, we model the sub-surface layers to consist of pebbles as well as of homogeneously packed dust grains. In the case of a homogeneous dusty surface material, we find a solution for the length-absorption coefficient of $alpha approx 0.22~mathrm{cm^{-1}}$ for a wavelength of 1.594 mm and $alpha geq 3.84~mathrm{cm^{-1}}$ for a wavelength of 0.533 mm and a constant thermal conductivity of $0.006~mathrm{Wm^{-1}K^{-1}}$. For the pebble scenario, we find for the pebbles and a wavelength of 1.594 mm a complex refractive index of $n = (1.074 - 1.256) + mathrm{i} , (2.580 - 7.431)cdot 10^{-3}$ for pebble radii between 1 mm and 6 mm. Taking into account other constraints, our results point towards a pebble makeup of the cometary sub-surface with pebble radii between 3 mm and 6 mm. The derived real part of the refractive index is used to constrain the composition of the pebbles and their volume filling factor. The optical and physical properties are discussed in the context of protoplanetary and debris disc observations. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2211.12807v1

Searching for Outbursts in the Ground-Based Photometry of 67P Churyumov-Gerasimenko by Daniel Gardener et al. on Monday 17 October 67P/Churyumov-Gerasimenko is a Jupiter-family comet that was the target of the Rosetta mission, the first mission to successfully orbit and land a probe on a comet. This mission was accompanied by a large ground-based observing campaign. We have developed a pipeline to calibrate and measure photometry of comet 67P during its 2016 perihelion passage, making use of all visible wavelength broadband imaging collected across a wide range of facilities. The pipeline calibrates the brightness of the comet to a common photometric system (Pan-STARRS 1) using background stars within the field allowing for compilation and comparison of multiple data sets. Results follow the predictions based on previous apparitions: 67P shows no obvious change in activity levels from orbit-to-orbit and coma colours remain constant throughout the apparition. We detected an outburst on 2015 August 22 of $sim$0.14 mag. The brightness and estimated mass of this outburst puts it in line with the outbursts directly observed on the nucleus by Rosetta. An in situ outburst was observed at the same time as the one seen from the ground, however linking these two events directly remains challenging. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2210.08915v1

Searching for Outbursts in the Ground-Based Photometry of 67P Churyumov-Gerasimenko by Daniel Gardener et al. on Monday 17 October 67P/Churyumov-Gerasimenko is a Jupiter-family comet that was the target of the Rosetta mission, the first mission to successfully orbit and land a probe on a comet. This mission was accompanied by a large ground-based observing campaign. We have developed a pipeline to calibrate and measure photometry of comet 67P during its 2016 perihelion passage, making use of all visible wavelength broadband imaging collected across a wide range of facilities. The pipeline calibrates the brightness of the comet to a common photometric system (Pan-STARRS 1) using background stars within the field allowing for compilation and comparison of multiple data sets. Results follow the predictions based on previous apparitions: 67P shows no obvious change in activity levels from orbit-to-orbit and coma colours remain constant throughout the apparition. We detected an outburst on 2015 August 22 of $sim$0.14 mag. The brightness and estimated mass of this outburst puts it in line with the outbursts directly observed on the nucleus by Rosetta. An in situ outburst was observed at the same time as the one seen from the ground, however linking these two events directly remains challenging. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2210.08915v1

We take a look back at what ESA's Rosetta mission taught us about comets as the comet it spent two years exploring - 67P/Churyumov-Gerasimenko - returns into the inner Solar System.Transcript See acast.com/privacy for privacy and opt-out information.

We take a look back at what ESA's Rosetta mission taught us about comets as the comet it spent two years exploring - 67P/Churyumov-Gerasimenko - returns into the inner Solar System.Transcript See acast.com/privacy for privacy and opt-out information.

In this special episode, Professor Konstantinos Giapis (Division of Chemistry and Chemical Engineering at the California Institute of Technology, CalTech) talks about: · how experiments and proving the Eley–Rideal reaction mechanism theoretically describe large scale reaction mechanisms such as those on the comet 67P/Churyumov–Gerasimenko for the production of molecular oxygen and methanol and · if glycine formation, another biomarker met on the comet 67P/Churyumov–Gerasimenko could be produced abiotically and explained by the Eley–Rideal reaction mechanism. After all, in Professor Giapis words, we are all cosmic dust. Music: "Fortitude" by Lance Conrad Source: Storyblocks

This episode contains: Operating without a safety net, the boys plow on ahead. Devon talks about how he writes and records music. Devon also attempts to do an article we've already covered. Oops. This Week in Space: Comet discovered to have its own northern lights. 67P/Churyumov-Gerasimenko was shown to have a far-ultraviolet aurora. We talk about the metric system and what it may be based on. https://www.sciencedaily.com/releases/2020/09/200921113857.htm Hello Internet, This is Your Dad Speaking: Intermittent Fasting Improves Health Without Altering the Body’s Core Clock. It's not just what you eat, it's when you eat it, says science. We talk about intermittent fasting and how some of us have done it in the past, some perhaps by accident. https://scitechdaily.com/intermittent-fasting-improves-health-without-altering-the-bodys-core-clock/ Science Fiction: We cover a lot this week: Jurassic World Camp Cretaceous, Doctor Who episode The Empty Child, The Offspring at the '99 Woodstock, Netflix's Away, Star Trek Lower Decks, Central Park, Apple and Onion, Project Power, The Boys, and Raised by Wolves. Jeez, and this is a free podcast?

Cassini data is still providing good science, and researchers recently found out that the northern hemisphere of Enceladus has fresh ice! Plus scientists directly measured the distance to a magnetar, and comet 67P/Churyumov-Gerasimenko has an aurora.   We've added a new way to donate to 365 Days of Astronomy to support editing, hosting, and production costs. Just visit: https://www.patreon.com/365DaysOfAstronomy and donate as much as you can! Share the podcast with your friends and send the Patreon link to them too! Every bit helps! Thank you! ------------------------------------ Do go visit http://astrogear.spreadshirt.com/ for cool Astronomy Cast and CosmoQuest t-shirts, coffee mugs and other awesomeness! http://cosmoquest.org/Donate This show is made possible through your donations. Thank you! (Haven't donated? It's not too late! Just click!) The 365 Days of Astronomy Podcast is produced by Astrosphere New Media. http://www.astrosphere.org/ Visit us on the web at 365DaysOfAstronomy.org or email us at info@365DaysOfAstronomy.org.

Cassini data is still providing good science, and researchers recently found out that the northern hemisphere of Enceladus has fresh ice! Plus scientists directly measured the distance to a magnetar, and comet 67P/Churyumov-Gerasimenko has an aurora.

First we return to JPL for an update on the Mars Helicopter that has just been attached to the belly of the 2020 Mars Rover. Then it’s across the pond for a review of the amazing science coming from the Rosetta mission that spent years exploring comet 67P/Churyumov-Gerasimenko. We wrap things up with another What’s Up view across the solar system and beyond. Learn more about this week’s guests and topics at: http://www.planetary.org/multimedia/planetary-radio/show/2019/0904-2019-balaram-helicopter-rubin-tubiana-rosetta.html

Hosts: Ed Brown, Penny Dumsday, Lucas Randall, Dr. Helen Maynard-Casely 00:01:16 NASA's InSight probe begins drilling into the Martian surface - and stops. 00:17:11 Twins are either identical (one egg splits into two copies) or fraternal (two eggs fertilised at the same time). But that's not always the case - as a mother in Queensland found out when she had sesquizygotic twins. 00:25:44 Timothy Ray Brown, who was known as The Berlin Patient, was the first person to be "cured" of HIV. Now a second man appears to have also been cured, using the same bone marrow transplant technique. 00:33:32 Saturn's largest moon, Titan, is also the only moon known to have a thick, dense atmosphere. But now, thanks to the Rosetta probe's studies of comet 67P/Churyumov-Gerasimenko, the origins of Titan's atmosphere may have been revealed. Dr. Helen Maynard-Casely is an instrument scientist for the WOMBAT high-intensity powder diffractometer at ANSTO, Australia's Nuclear Science and Technology Organisation. This episode contains traces of Loudwire's Toni Gonzalez reporting on an Australian study of people who listen to Death Metal.

Dr. Patrick Michel talks about comet 67P/Churyumov–Gerasimenko, which was visited by the Rosetta spacecraft. This comet's shape was puzzling. It looked like it had survived a collision, but how could a fragile icy comet survive a high-energy impact? A new study by Dr. Michel and his team sheds light on this mystery.

La tertulia semanal en la que repasamos las últimas noticias de la actualidad científica. En el episodio de hoy: Nuevo estado de la materia: El excitonium; El magnetismo de un agujero negro; Lucy, la futura misión a asteroides troyanos de Júpiter; Compuestos orgánicos en el cometa 67P Churyumov-Gerasimenko; Quásares lejanos: luces que alumbran los bosques Lyman-alfa . En la foto, de arriba a abajo y de izquierda a derecha: Francis Villatoro (videoconferencia), Carlos Westendorp, Marian Martínez, Javier Licandro, Héctor Vives. Todos los comentarios vertidos durante la tertulia representan únicamente la opinión de quien los hace… y a veces ni eso. CB:SyR es una colaboración entre el Área de Investigación y la Unidad de Comunicación y Cultura

La tertulia semanal en la que repasamos las últimas noticias de la actualidad científica. En el episodio de hoy: Nuevo estado de la materia: El excitonium; El magnetismo de un agujero negro; Lucy, la futura misión a asteroides troyanos de Júpiter; Compuestos orgánicos en el cometa 67P Churyumov-Gerasimenko; Quásares lejanos: luces que alumbran los bosques Lyman-alfa . En la foto, de arriba a abajo y de izquierda a derecha: Francis Villatoro (videoconferencia), Carlos Westendorp, Marian Martínez, Javier Licandro, Héctor Vives. Todos los comentarios vertidos durante la tertulia representan únicamente la opinión de quien los hace… y a veces ni eso. CB:SyR es una colaboración entre el Área de Investigación y la Unidad de Comunicación y Cultura

Watch Dr. Bjorn Davidsson from JPL discuss morphology and geology of short-period comet 67P/Churyumov-Gerasimenko. This talk was presented at the Keck Institute for Space Studies short course Comets - Connecting the Origins of Solar Systems to the Origins of Life on June 5, 2017.

Comenzamos el programa poniendo rumbo a Europa, el satélite más enigmático de Júpiter. Los datos obtenidos hasta ahora indican que bajo su superficie helada debe existir un enorme océano interior que tal vez albergue vida. Ese es el objetivo de una futura misión de la NASA, llamada Clipper. Desde allí regresaremos a la Tierra porque una investigación que relatamos hoy en el programa da un paso bastante importante, por lo que parece, hacia conseguir el objetivo de revertir el envejecimiento y retrasarlo o frenarlo por un tiempo. Saltaremos de nuevo el espacio para conocer cómo ha cambiado la superficie de un cometa a su paso por el punto más cercano al Sol. El cometa es 67P/Churyumov Gerasimenko y la sonda que lo siguió y fotografió fue Rosetta. Y para terminar, los fósiles del valle Bighorn, en el estado de Wyoming, en los EE.UU, cuentan un efecto curioso del calentamiento global: El enanismo en ciertas especies.

The recent Rosetta mission to image and land a probe on a comet was an astounding achievement. Rosetta took thousands of photos mapping the entire surface of comet 67P/Churyumov-Gerasimenko , as it dramatically changed over 2 years. This week analysis of 18000 67P pictures are out of the shade and into the sunlight. Adam Rutherford talks to study leader Raamy El Maary on the intriguing insights and what they suggests about the evolution of comets as they pass through our solar system. And while no-one has any doubt that volcanoes are extremely dangerous forces of nature, Science correspondent Rebecca Morelle was caught in an unusual and terrifying eruption last week. She tells BBC Inside Science the perils of reporting up close from the side of Etna and the rare kind of eruptions that are unique to snowy volcanoes. What are our brains doing when we're navigating through towns and cities? A new study from a team at University College London has made detailed maps of brain activity when negotiating the very windy London streets of Soho and compared it to what our brains are up to when we're simply following a sat nav. Hugo Spiers discusses the results and how this kind of neuroscience has a role to play in the future design of new street networks and cities. And we feature the private life of the octopus - a seemingly alien intelligence right here on Earth as philosopher Peter Godfrey-Smith discusses his new book "Other Minds: The Octopus and the Evolution of Intelligent Life", in which he literally dives into the oceans and delves in to the workings of the octopus mind Producer Adrian Washbourne.

068: Swelling Progress (Bandcloud) 20/3/16 Dublin, Ireland http://www.shockworldservice.com/ 1. Jana Irmert – Altitude Adjustment From a compilation called self​-​identified non​-​male artists making experimental electronic music. Irmert is a Berlin-based sound artist, “interested in the vague, irrational, less tangible aspects of existence”. 2. Head Dress – Devil's Triangle LA-based Ted James Butler, who also records cassette-only podcast Norelco Mori. This experimental track was released on Castle Bravo. 3. CUBOP – Nocturnal Panacea CUBOP shared this track as an "aural gift". A nice clash of experimental noise & more earthly sounds. 4. Vlasta Burian – Vlasta Burian v Obrazarne (in the Picture Gallery) This excerpt comes from a compilation of tracks related to The Okeh Laughing Record. It's a 1930 recording of a Czech comedian. 5. Leaaves – The Only One Who Knew Leaaves makes lush music fuelled by melancholy; this track comes from a release called We Will Forget Our Sadder Days In Summers That Never End. Apt. 6. David Fyans – In An Object Sign up to this guy's Bandcamp sub. He drops beautiful ambient modulations all the time. 7. Mr Mitch – The Man Waits (Talbot Fade's Extension Cord To The Abyss Mix) I first got to know Talbot Fade when he shared his debut self-released album with me on Twitter. I was blown away. The first time we met was going to Boxed, where Mitch was playing. Now he's remixing Mitch & collaborates with him as Yaroze Dream Suite.

Stream episodes on demand from www.bitesz.com and www.spacetimewithstuartgary.com (both mobile friendly) *Rosetta’s Comet 67P is much younger than previously thought Rosetta’s comet 67P Churyumov–Gerasimenko may be only a billion years old – billions of years younger than previously thought. The new findings are based on simulations of how the two lobes which form the comet -- came together and remained connected. *Solving one of the mysteries of globular clusters A new study has finally resolved where the material needed to make new generations of stars in globular clusters comes from. Because the stars were all originally formed from the same material – mystery has surrounded exactly how new generations of globular cluster stars are made. *Have scientists found a way to bypass the Second Law of Thermodynamics? Scientists have found a way to circumvent the Second Law of Thermodynamics – one of the bedrocks on which modern theoretical physics is based. It is one of a handful of laws about which physicists feel most certain about. *WorldView 4 launches on Atlas V rocket An Atlas V rocket has blasted into orbit from the Vandenberg Air Force base in California carrying the WorldView 4 high-resolution satellite. The flight had been delayed since September by fuel leaks and wildfires. If you're enjoying SpaceTime, please help out by sharing and telling your friends. The best recommendation I can get is one from you. Thank you... #space #astronomy #science #technology #news #rosetta #worldview4  Learn more about your ad choices. Visit megaphone.fm/adchoices Support this show http://supporter.acast.com/spacetime. See acast.com/privacy for privacy and opt-out information.

Stream episodes on demand from www.bitesz.com and www.spacetimewithstuartgary.com (both mobile friendly). *Recently active lava flows detected on Venus A new analysis of data from the European Space Agency's Venus Express mission has found evidence of volcanic activity on Earth’s sister planet. The findings add to a growing body of evidence that Venus may still be geologically active. The origin of Rosetta’s comet A new study claims Rosetta’s comet 67P/Churyumov-Gerasimenko most likely originated in the Kuiper Belt. This distant origin for 67P implies it would be made from primordial material, that existed in their current form since before Earth was born. Soyuz trio return safely to Earth Three expedition 49 crew members have returned safely to Earth following their 115 day mission aboard the International Space Station. The successful landing was also the first atmospheric re-entry of the new Russian Soyuz MS-01 capsule which had been on its maiden flight. China ready to fly its new Long March 5. There’s growing evidence that China is getting ready to fly its new Long March 5 heavy lift rocket for the first time. The new heavyweight launcher is capable of lifting over 25 tonnes into low Earth orbit -- that’s more than the European Space Agency’s Ariane 5 ECA and roughly as much as the United Launch Alliance’s Delta IV heavy. If you're enjoying SpaceTime, please help out by sharing and telling your friends. The best recommendation I can get is one from you. Thank you... #astronomy #space #technology #science #news #venus #soyuz #rosetta #exploration  Learn more about your ad choices. Visit megaphone.fm/adchoices Support this show http://supporter.acast.com/spacetime. See acast.com/privacy for privacy and opt-out information.

La sonde européenne Rosetta est arrivée au voisinage de la comète 67P/Churyumov-Gerasimenko à l'été 2014. Quelques mois plus tard, le petit atterrisseur Philae s'est posé sur la comète de façon acrobatique. Philae a néanmoins fonctionné avec succès durant 3 jours jusqu'à épuisement de sa pile. Depuis la sonde a effectué un grand nombre de découvertes sur la structure et le fonctionnement de la comète qui seront discutées. Fin septembre, la sonde se posera sur la comète lors d'un atterrissage qui clôturera en beauté la mission. Cette dernière phase permettra des analyses et des observations à très faible distance du noyau qui viendront enrichir la moisson de données déjà engrangée. Les phases de survol à proximité de la surface ont et seront mises à profit pour repérer Philae sur la surface ce qui permettrait de mieux comprendre les raisons de son réveil erratique et les problèmes de communication rencontrées au début de l'été 2015. Les intervenants => Francis Rocard, CNES ; Sylvain Lodiot, ESA.

La sonde européenne Rosetta est arrivée au voisinage de la comète 67P/Churyumov-Gerasimenko à l’été 2014. Quelques mois plus tard, le petit atterrisseur Philae s’est posé sur la comète de façon acrobatique. Philae a néanmoins fonctionné avec succès durant 3 jours jusqu’à épuisement de sa pile. Depuis la sonde a effectué un grand nombre de découvertes sur la structure et le fonctionnement de la comète qui seront discutées. Fin septembre, la sonde se posera sur la comète lors d’un atterrissage qui clôturera en beauté la mission. Cette dernière phase permettra des analyses et des observations à très faible distance du noyau qui viendront enrichir la moisson de données déjà engrangée. Les phases de survol à proximité de la surface ont et seront mises à profit pour repérer Philae sur la surface ce qui permettrait de mieux comprendre les raisons de son réveil erratique et les problèmes de communication rencontrées au début de l’été 2015. Les intervenants : Francis Rocard, CNES ; Sylvain Lodiot, ESA.

Themen: Atom Text Editor, Electron Cross Platform Framework für Desktop Apps, PowerShell ist Open Source, Nosulus Rift, Kerzenduft "Neuer Mac", Gerüchte über Apple Store in Wien, iTunes Alternative iTools, ZEIº Time Tracking Würfel, Vello Bike+, Lilium Aviation, AeroMobil, Bodeneffektfahrzeug, Kaspisches Seemonster, Self driving cars dilemma Moral Machine, Rosetta Mission ist zu Ende, 67P/Churyumov-Gerasimenko, Funktionale Programmierung, elixir, Phoenix web framework, Layer 8 Podcast, Panoptikum Podcast discovery and community, Subscribe 8 vom 14.-16.10.2016 in München, DevFest Vienna 2016 vom 5.-6.11.2016, Privacy Week in Wien vom 24.-30.10.2016, Chatbot, WeChat, Turing-Test, Watson As A Service, Microsoft Cognitive Services APIs, The AI Revolution: The Road to Superintelligence, AKG schließt Werk in Wien, Aua-uff-Code! Podcast, Vienna Beamers (Twitter), Emoji, Emoji Programming Language (Emojicode), Isotype, Otto Neurath, Biertaucher Podcast Gäste: Bernhard, Sindre und Stefan (Twitter)

Bienvenidos al programa número 5 de Radio Skylab. Del 4 al 10 de octubre se celebra la Semana Mundial del Espacio y para celebrarlo hemos preparado un programa con dos especiales. La primera parte está dedicada a Marte y los planes de SpaceX para colonizarlo presentados la semana pasada por Elon Musk. Y la segunda parte trata sobre la Misión Rosetta, que finalizó hace pocos días al impactar con el cometa 67P/Churyumov-Gerasimenko. En esta primera parte, que publicamos hoy, Víctor Manchado (Pirulo Cósmico), Daniel Marín (Eureka), Kavy Pazos (Mola Saber) y Víctor R. Ruiz (Infoastro) charlamos sobre Marte, las misiones propuestas de exploración humana al Planeta Rojo, el origen de SpaceX y, finalmente, los planes presentados por Elon Musk para ir a Marte. Y además, la sección de retroalimentación con las preguntas de los oyentes. ¡Acompáñanos!

Bienvenidos al programa número 5 de Radio Skylab. Del 4 al 10 de octubre se celebra la Semana Mundial del Espacio y para celebrarlo hemos preparado un programa con dos especiales. La primera parte está dedicada a Marte y los planes de SpaceX para colonizarlo presentados la semana pasada por Elon Musk. Y la segunda parte trata sobre la Misión Rosetta, que finalizó hace pocos días al impactar con el cometa 67P/Churyumov-Gerasimenko. En esta primera parte, que publicamos hoy, Víctor Manchado (Pirulo Cósmico), Daniel Marín (Eureka), Kavy Pazos (Mola Saber) y Víctor R. Ruiz (Infoastro) charlamos sobre Marte, las misiones propuestas de exploración humana al Planeta Rojo, el origen de SpaceX y, finalmente, los planes presentados por Elon Musk para ir a Marte. Y además, la sección de retroalimentación con las preguntas de los oyentes. ¡Acompáñanos!

Today, the European Space Agency's Rosetta spacecraft will engage its thrusters for one final maneuver: a suicidal plunge toward the comet it has been orbiting for two years and chasing for a decade. After Rosetta collides with comet 67P/Churyumov-Gerasimenko, its systems will go dark. Scientists will never hear from it again.

We speak to Gerhard Schwehm the lead Scientist and Mission Manager a week before the end of the mission, with Rosetta's final descent onto the comet 67P/Churyumov–Gerasimenko. Recorded live at New Scientist Live. Special Thanks to British Interplanetary Society and Vix Southgate If you enjoy why not join the BIS at www.bis-space.com the oldest space advocacy organisation in the world. Hosts: Matt Russell and Jamie Franklin Guest: George and Arthur Russell Cover: ESA Music: Matt Russell / Iam7 Additional Narration: George Russell

'n Ruimtenavorsingsprojek wat alreeds in die jare sewentig begin is, sal Vrydag op 'n dramatiese wyse tot 'n einde kom. Die Rosetta-ruimtetuig sal na verwagting om 12:40 Suid-Afrikaanse tyd teen die komeet 67P/Churyumov-Gerasimenko bots. Melissa Tighy het by 'n seniornavorsingsgenoot by die Suid-Afrikaanse Nasionale Ruimte-agentskap, dr. Pieter Kotze, gaan uitvind wat die rede vir die botsing is.

We talk about the ISS Expedition #48 crew returning to Kazakhstan via the Soyuz TMA20M capsule and upcoming crew and cargo missions. Gravitational waves are causing a ripple effect in the science community. LIGO and its' value, well the science community is recognizing a need for greater emphasis on this type research. The ESA Rosetta spacecraft finds the Philae lander on comet 67P/Churyumov–Gerasimenko less than a month before the end of the Rosetta mission. Adding to the list of found spacecraft, the NASA Deep SpaceTracking Network located spacecraft STEREO-B. Hopefully future news will include establishing positive control and resumption of solar science observation. JUNO is sending spectacular pictures of Jupiter including never before seen images of the Polar Regions. JUNO is changing our understanding of the planet in dramatic ways. Citizen science is real, check out JunoCam to learn what regular people have a voice in. We again discuss the cost paid per astronaut for NASA to use Roscosmos to launch and return our astronauts to the International Space Station. So sad too bad. Speaking of bad, on September 1, 2016 SpaceX lost the AMOS-6 Falcon 9 rocket/payload on the pad during an engine test. Investigations into the SpaceX described “anomaly” are ongoing and as of September 17 no information has been updated on the SpaceX website since September 2nd (the day after the rocket was lost). The Talking Space crew talks more about this unfortunate “anomaly” than what we've heard from SpaceX so far. Investigations into these type events often take more time than one anticipates....#justsayin. The Talking Space Team reminisces about our 7 years of bringing news and more to you our listener. Thank all of you for joining us here. Show recorded 09-06-2016 Host: Sawyer Rosenstein Panelists: Gene Mikulka, Kassy Tamanini, Kat Robison

Alors que des composés organiques avaient déjà été détectés sur la comète 67P/ Churyumov-Gerasimenko par Philae sous forme de gaz, des composés organiques solides sous forme de macromolécules, viennent pour la première fois d'être identifiés dans des grains de poussière par Rosetta.

Trente jours avant son crash sur la comète 67P/Churyumov-Gerasimenko en forme d'apothéose , la sonde Rosetta fait encore parler d'elle, ou du moins les données de ses instruments : une nouvelle publication révèle aujourd'hui, via des mesures inédites, la structure des particules de poussière de la comète, éclairant ainsi les processus qui ont formé le système solaire.

Monica Grady, The Open University “In space, no one can hear you scream” was the tagline of the 1979 box office film success Alien. And it’s true. Sound waves propagate mechanically as a vibration and therefore need a medium – solid, liquid or gas – to travel through. Although interplanetary (and interstellar) space is not completely empty, gas molecules and dust grains are so sparsely distributed that they do not form a continuous medium that would enable sound waves to be transmitted directly. But there are many locations in the solar system where it might actually be quite noisy. Such places will have a medium through which sound waves can be transmitted – for example, an atmosphere or an ocean. And we have only started to explore what they sound like. NASA announced that its next mission to Mars, the Mars 2020 lander, will carry a microphone so that the soundscape of the planet can be recorded. This is not the first time that a microphone has been sent to Mars – the US Planetary Society sponsored a microphone on the Mars Polar Lander mission in 1999. Unfortunately, the spacecraft crashed before any recordings could be transmitted. A microphone was also part of one of the instruments on the Phoenix Lander of 2008, but because of concerns about an interface problem with the landing system, the instrument was not switched on. The tantalising sounds of Titan and comet 67P Titan in true color. NASA We do have some recordings of space sound already – when the European Space Agency’s (ESA) Huygens spacecraft landed on Saturn’s giant moon Titan in January 2005, the probe recorded its journey down through Titan’s atmosphere. When you listen to the recording, you get a real impression of the capsule being buffeted by winds as it floated to the surface. The point of an experiment like this is to use the sound to infer how the pressure of Titan’s atmosphere changes with depth. This can then be used to build a circulation model for Titan, similar to the ones we use on Earth to forecast the weather and understand changes in climate. Speeding through Titan’s haze. ESA443 KB (download) And, at a time when ESA’s Rosetta mission is drawing to a close, we should remember that its target comet, 67P Churyumov-Gerasimenko, was singing out into the void as it approached the sun. We also heard the thud of the comet lander Philae’s arrival when it touched down on the comet in November 2014. There are soundscapes of other solar system bodies including Jupiter and the rings of Saturn. But these are not direct audio recordings – they are a conversion of electromagnetic vibrations into audio signals. They sound pretty weird. Sounds of the planets. Music of Mars You only have to imagine being in a desert to realise the variety of sounds a microphone on the surface of Mars could record – and how they can be interpreted. First of all, the wind, whistling across the planetary landscape – how fast is it travelling? How often does it vary in speed or direction? What does a dust devil sound like? Or a dust storm? What about the crack of thunder associated with a lightning bolt? Or the variation in pressure during an electric storm? Once the wind drops, the gentle sounds that break the silence can be heard: the settling of dust grains disturbed by the wind. There are several engineering advantages to having a microphone carried by a rover on Mars. As the vehicle trundles across the landscape, we might hear the noise of crashing gears, and realise that sand had clogged the wheels. This would allow engineers to diagnose problems more efficiently, and work out strategies to ameliorate or avoid them. We have heard some sounds of a rover on Mars already: NASA released audio from the Opportunity rover’s 11-year marathon. But like the sounds of Jupiter and Saturn’s rings, these sounds were not recorded directly – they are a conversion of the vibrations of the rover into audio as it travelled across the surface.

Det är fysikvärldens snackis; detektionen av gravitationsvågor vid LIGO-observatoriet i USA. Vad är egentligen gravitationsvågor, och hur gick upptäckten till? Detta följs av en djupdykning i kometforskning med Anders Eriksson, forskare vid Institutet för rymdfysik, IRF, i Uppsala. Rosetta är ESA:s rymdsond, vars mål är att studera kometen 67P/Churyumov-Gerasimenko (kort: 67P). Till skillnad från andra […] The post Rymdpodden #4: Rosetta appeared first on Astronomisk Ungdom.

The first case of a human falling ill from cancer cells contracted from a parasitic tapeworm has been reported in Columbia. And in an unrelated story, a Californian man has had a live tapeworm removed from his brain in a potentially life-saving operation. The Rosetta probe orbiting 67P/Churyumov–Gerasimenko has surprised everyone by detecting large amounts of molecular oxygen on the comet. The finding suggests molecular oxygen was present when the comet was formed soon after the birth of the solar system, 4.6 billion years ago. Stanford University researchers have discovered how jellyfish actually swim – and it's not how previously thought. They make a region of low pressure ahead of themselves, essentially sucking themselves forward. Lucas mentions Smarter Every Day's video of a balloon in a car.

C'est désormais officiel, à la fin de sa mission en septembre prochain, Rosetta rejoindra son petit Philae pour l'éternité sur la surface de la comète 67P/Churyumov-Gerasimenko. Mais le crash sera fait très "lentement", de manière à acquérir des dernières données au plus près de la surface du noyau cométaire...

On ne parle que de ça depuis hier. Rosetta a détecté la présence inattendue de dioxygène dégazant de la surface de la comète 67P/Churyumov–Gerasimenko. C'est la première fois que de l'oxygène est observé en abondance sur une comète, et sa présence n'est pas encore clairement expliquée...

Schwerpunkt: Iris Gebauer vom Karlsruher Institut für Technologie über den AMS-02-Detektor an Bord der Internationalen Raumstation, mit dem Wissenschaftler seit einigen Jahren die Eigenschaften der kosmischen Strahlung untersuchen || Nachrichten: Hinweise auf Selbstwechselwirkung Dunkler Materie beobachtet | Druckbild von Laserdruckern unter die Lupe genommen | Kometenkern von 67P/Churyumov-Gerasimenko erstaunlich unmagnetisch || Veranstaltungen: Hamburg | Bremen | Tübingen

Historian Justin Champion on Early Modern Comet Theory Those who watched in awe as the space craft Philae bounced its way onto a comet last November should hold a candle for William Whiston. Back in 1696 this British theologian, mathematician and acolyte of Isaac Newton published a book called 'A new theory of the earth'. In it he argued that comets were responsible for the origins of the earth and life upon it. This was what Philae was tasked to help us find out when it dotted down on comet 67P/Churyumov-Gerasimenko. Not only does this feel like a coup for early modern farsightedness it also reminds us that much of early science was not built in opposition to Christianity but in order to justify it. Whiston's investigation of the natural world (like those of his peers) was designed to show how the biblical account of creation was true.

The Discussion: Christmas in Cydonia and teaching science to children through astronomy education. The News: Kicking off 2015 we round off the events that concluded 2014: the successful test flight of NASA’s Orion capsule; NASA’s Mars Science Laboratory pieces together the clues that tell us how Mount Sharp (the mountain Mars Curiosity is exploring) was formed; and science findings from ESA’s Rosetta and Philae spacecraft that suggest water was not delivered to Earth by comets like 67P Churyumov Gerasimenko. The 5 Minute Concept: This month Paul delves into the fundamental nature of our universe. We take a look at the Cosmological Principle, which tells us that the universe and the forces within it are the same wherever we look, and explore huge structures that put strain on this accepted model of cosmology. The Interview: Ralph & Paul speak with the creators of the ‘Essex Space Agency’, Matt Kingsnorth and Phil St Pier who are building a high altitude balloon with cameras to photograph the Earth’s curved horizon from the edge of space in their Helium Tears project. Q&A: Listeners’ questions via email, Facebook & Twitter take us on a journey into the astronomy issues that have always plagued our understanding or stretched our credulity. This month Ralph & Paul answer: Are there Van Allen Belts & Aurora on other planets? Any photos from satellites orbiting other planets in our solar system? Mariecor Agravante in San Diego via twitter. Why was the moon so large the other night?Ian Cheale in Cambridgeshire via the Facebook Group.

Rosetta has analysed the water found on comet 67P/Churyumov–Gerasimenko and found significant differences compared to water on Earth. This may weaken the theory that comets brought water to an early Earth.One of the most common minerals on our planet finally has a name. We've known Brigmanite exists for a long time, but it was a surprising source that gave scientists the opportunity to study it up close.The New Horizons spacecraft has just been successfully woken up, and is on track to giving us our first up-close look at Dwarf Planet Pluto next year.And the Dawn space probe has just taken its first low quality photo of minor planet Ceres, the largest object in the main asteroid belt. Dawn is expected to arrive at Ceres in early 2015.Traditional forensic DNA tests can't tell the difference between identical twins, but a new test may change that. A preliminary hearing is scheduled for early next year to determine whether evidence from the test is admissible in US Courts.A three-year-old child died and several young children fell ill in Victoria, Australia after drinking raw milk. We discuss why unpasteurised milk is legally sold in Australia as 'bath milk' and why some people choose to drink it.

This mix is built around mysterious vocals. Vocals that may guide you, or lure you, into distances unknown. Often, but not exclusively, female, and some of them not even human - like the beautiful flute-playing by Jean-Christophe Bonnafous, or the mysterious singing sound of the comet 67P/Churyumov-Gerasimenko that was recently discovered during the Rosetta space missions. With just a little fantasy you can imagine the Philae Space Lander being attracted by the comet's song - ultimately leading it to an untimely death. --- originally published on Ambientblog --- Start - Length - Artist - Title (Album Title, Release Year, Label #) 00:00 2:39 Mendel Kaelen - Suñayaca Tãla(Sequence 8, 2014, Futuresequence SEQ008)01:51 01:41 Hildur Gudnadottir - Poka(Saman, 2014, Touch TO:96)03:16 00:54 Dan Romer & Benh Zeitlin - End of the World Theme(Beasts of the Southern Wild OST, 2012, Thirty3 and a 3rd Records)03:28 04:06 Giulio Aldinucci - Fieno(Aer, 2014, Dronarivm DR-25)05:56 03:46 Iva Bittová - Fragment VI(Iva Bittová, 2013, ECM Records ECM 2275)07:13 02:55 Ambient Music Therapy - Sleep 3(Ultimate Sleep System, 2005, Self-Released)08:07 02:57 Above, Convenience Store! - Boneyard Stray Dog(Building in Search of the Sun, 2013, Sparkwood Records SR01)10:15 03:54 Penjaga Insaf - Pulang(Sama Sadja, 2010, Power & Steel PAS27)11:52 01:47 Andrew Skeoch & Sarah Koschak - Distant Bellbirds(Favourite Australian Birdsong, 2001, Listening Earth LECD 10)13:25 01:28 Andrew Skeoch & Sarah Koschak - Pied Butcherbirds(A Morning in the Australian Bush, 1996, Listening Earth LECD 9601)14:11 01:06 Ambrose Field - Technoform 7(Quantaform Series, 2013, Sargasso SCD28071)14:45 00:40 Andrew Liles - Tinder Box(Black Beauty, 2007, Beta-Lactam Ring Records MT127)14:54 05:02 Enrico Coniglio - Existenz Minimum(Areavirus Topofonie Vol. 1, 2007, Psychonavigation Records PSY 020)19:32 01:30 Cliff Martinez - Wrong Floor(Drive OST, 2011, Sony/Lakeshore Records 88691975162)20:36 03:21 Field Rotation - The Repetition of History(Fatalist The Repetition of History, 2013, Denovali DEN161)23:30 01:25 Asne Valland Nordli - Veverskens Tid(Over Tones, 2014, ECM Records ECM 2315)24:30 04:01 Darren Harper - Will My Memories of You Hold True(Suspended Memory, 2011, Self-released)26:48 04:06 David Toop - Disposal Chute Inoperative(Mondo Black Chamber, 2014, Sub Rosa SR385)29:39 01:57 Jack Dangers - Blast Off(Bathyscape Trieste, 2013, Primary Numbers PRIMA007)31:03 02:32 Andrew Liles - Aviophilia(In My Father's House There Are Many Mansions, 2006, Fourth Dimension Records FDCD68)32:50 02:16 Rodolpho Alexis - Parabolic Amphibian Mix (Various Tree Frogs)(The Wire Tapper 34, 2014, Wire Magazine Issue 362)33:37 02:00 Lustmord - Babel(The Word as Power, 2013, Blackest Ever Black BLACKESTCD004)35:17 03:18 Desert of Hiatus - Trepidation's Skin(Inconsolable Grief, 2014, self-released)37:51 02:56 Alogon - Snow(Wound, 2014, Under U.R. 08)38:49 02:29 Jean-Christophe Bonnafous - Alterina(Graines de Berceuses, 2012, Prokosnovénie, Prik144)39:28 02:23 A Day for Strange Birds - The Night Creeps(The Sound Between The Noise, 2014, self-released)40:40 02:16 Stefkovic van Interesse - Nebelmarsch(In the Fields, 2013, Self-Released)42:35 04:24 Pauline Oliveros - Watertank Software(Vor Der Flut - Hommage an einen Wasserspeicher, 1985, Eigelstein Musikproduktion, ES2025/26 CD)46:37 00:55 Paul Schütze - Sacred Agents(New Maps of Hell, 1996, Big Cat ABB 104 CD )47:02 03:31 Deaf Center - The Day I Would Never Have(Owl Splinters, 2011, Type TYPE080 )50:02 03:15 Mariolina Zitta - Sonar(Concert for Bats, Voices and Natural Sounds, 2007, Earth Ear ee6142)51:46 02:33 Max Eastley - Hydrophone String Installation(Installation Recordings 1973 - 2008, 2010, Paradigm Discs PD26)53:08 05:27 Ian William Craig - Either Or(A Turn of Breath, 2014, Recital 8)57:12 02:27 Mica Levi - Alien Loop(Under the Skin OST, 2014, Milan M2-36678)58:24 00:41 ESA Operations - A Singing Comet(ESA Operations Rosetta Mission, 2014, Soundcloud)59:00 00:47 Jon Hopkins - Distant Fire(How I Live Now OST, 2013, Just Music TAO056)

This mix is built around mysterious vocals. Vocals that may guide you, or lure you, into distances unknown. Often, but not exclusively, female, and some of them not even human - like the beautiful flute-playing by Jean-Christophe Bonnafous, or the mysterious singing sound of the comet 67P/Churyumov-Gerasimenko that was recently discovered during the Rosetta space missions. With just a little fantasy you can imagine the Philae Space Lander being attracted by the comet's song - ultimately leading it to an untimely death. --- originally published on Ambientblog ---

The Rosetta mission with a destination of comet 67P/Churyumov-Gerasimenko has faced numerous conspiracies circulating throughout the internet (and even more mispronunciations of its target). In this episode, I talk about a few of them.

1.5 billion is a lot for a space mission. Is it worth it? Today we update on the Rosetta probe onto comet 67P/Churyumov-Gerasimenko. In an update after the show, we learn that the Philae's first bounce lasted nearly 2 hours.   Closer to Earth, Associate Professor Nick Barnes from NICTA talks to us about the bionic eye. We probe into aspergers, what is, and what does it mean. In December, we'll be interviewing Dr Peter Enticott about TMS treatments for aspergers. And then we look at medicinal uses of cannabis, a contentious subject covered in a recent Ask Fuzzy column. (Send your questions to AskFuzzy at Zoho.com) Brought to you by Ian and Rod

Ebola has rocked the world in 2014, but why has this outbreak been so devastating? This week we get inside Ebola to find out about the virus itself, and how it causes disease and spreads. We talk to healthcare and charity workers on the ground in West Africa to find out how what is being done to stem the epidemic; we catch up on progress towards a vaccine and we hear how the virus is also crippling gorilla populations. Plus, in the news, the latest on the Rosetta mission to comet 67P-Churyumov-Gerasimenko and how Wikipedia can reveal what diseases are circulating and where...

Ebola has rocked the world in 2014, but why has this outbreak been so devastating? This week we get inside Ebola to find out about the virus itself, and how it causes disease and spreads. We talk to healthcare and charity workers on the ground in West Africa to find out how what is being done to stem the epidemic; we catch up on progress towards a vaccine and we hear how the virus is also crippling gorilla populations. Plus, in the news, the latest on the Rosetta mission to comet 67P-Churyumov-Gerasimenko and how Wikipedia can reveal what diseases are circulating and where... Like this podcast? Please help us by supporting the Naked Scientists

Ebola has rocked the world in 2014, but why has this outbreak been so devastating? This week we get inside Ebola to find out about the virus itself, and how it causes disease and spreads. We talk to healthcare and charity workers on the ground in West Africa to find out how what is being done to stem the epidemic; we catch up on progress towards a vaccine and we hear how the virus is also crippling gorilla populations. Plus, in the news, the latest on the Rosetta mission to comet 67P-Churyumov-Gerasimenko and how Wikipedia can reveal what diseases are circulating and where... Like this podcast? Please help us by supporting the Naked Scientists

Partie il y a plus de 10 ans à la poursuite de la comète 67P/Churyumov-Gerasimenko, la sonde Rosetta est finalement arrivée à sa rencontre en août 2014. Après s'être placée en orbite autour de la comète, Rosetta a largué, le 12 Novembre dernier, un petit robot nommé Philae qui est allé se poser à la surface de la comète. Grâce à de nombreux instruments de mesure embarqués sur Philae et sur Rosetta, nous allons en apprendre plus sur ces corps primitifs du système solaire que sont les comètes et peut être même sur les origines de la vie sur Terre... Cette première dans l'histoire de la conquête spatiale est l'occasion pour nous d'acceuillir un grand nom de la diffusion des sciences au Québec et grand passionné d'astronomie : Pierre Chastenay. Écoutez-le, nous parler de cette mission sans précédent qui se déroule actuellement à quelques 500 millions de kilomètres de la Terre !  

(Vi beklager at lydkvaliteten ikke er på topp denne episoden – men vi skal mer enn gjøre opp for oss i neste!) Nyhetssaker Breaking news som vi akkurat rakk å få med oss til innspilling av denne episoden: Philae har landet på kometen 67P/Churyumov–Gerasimenko. Lille, søte Philae har selvsagt en egen Twitter-konto og xkcd kjørte en egen live-oppdatert stripe ettersom nyhetene kom frem. En mulig naturlig forklaring på spøkelser og andre gufne opplevelser har blitt lagt frem eksperimentelt. Saken mot den siktede healeren i nord-Norge går videre. Og familien til den kreftsyke kvinnen som døde, advarer. Lytterspørsmål William spør: I podcast nr. 83 diskuterte dere Folkeopplysningen og temaet EL-overfølsomhet. I episoden av Folkeopplysningen intervjuet de en dame som hadde fått ombygget kontoret sitt for 200.000kr for å hindre at stråling kom inn. Blant annet brukte hun gardiner av sølv, samt en spesiell maling. De viste også en del annonser på slike produkter, og de kostet gjerne flerfoldige tusenlapper. Det jeg lurer på er, hjelper det egentlig å bruke sølvtråd/sølvgardiner, eller maling mot stråling? Og hvilke frekvenser er det isåfall disse stopper? Eller er dette bare humbug? Det burde vel være enkelt å forske på dette. Hva tenker dere i Saltklypa? Vi forsøker oss på et svar, og åpner for at lytterne våre også vil bidra med sin ekspertise! Husk at Saltklypa tar imot spørsmål, tips, ris og ros på post(at)saltklypa.no, eller via vår Facebook- og Twitter-profil. Anbefalinger Pernille Nylehns artikkel i Fri Tanke om lovgivning innen alternativ behandling. Også i Aftenposten.

Esta semana se han publicado dos importantes estudios que avanzan nuestra comprensión sobre un fenómeno biológico que sin duda interesa: la violencia. Uno de estos trabajos aborda el tema de si la violencia de los machos hacia las hembras aumenta su frecuencia de reproducción, es decir, si los machos violentos engendran más hijos que los menos violentos. El segundo estudio oborda otro tipo de violencia, la de los machos adultos contra los cacchorros de su misma especie ¿Por qué los machos de algunas especies de mamíferos cometen infanticidios y otros, no? Y entre ambos estudios damos un repaso a la odisea espacial de la sonda interplanetaria Rosetta y comentamos el descenso del módulo Philae sobre la superficie del cometa 67P/Churyumov-Gerasimenko.

Retour sur l’aventure de la semaine, la sonde Rosetta, le robot Philae et la comète 67P Churyumov-Gerasimenko dont le monde entier, ou presque, a finalement appris à prononcer le nom.

On November 12, 2014, the European Space Agency’s Rosetta mission landed a probe on the surface of 67P/Churyumov–Gerasimenko, a small comet hundreds of millions of kilometers from the Sun. Comets are time capsules dating back to the earliest days of our solar system, and the data gathered by this mission could reveal the role played by comets in delivering water and organic molecules to an infant Earth.

The Rosetta space probe has finally arrived and is currently in orbit around the comet 67P Churyumov-Gerasimenko! Rosetta is now officially the first spacecraft to rendezvous with a comet.A previously unknown tribe of humans has emerged from the rainforest in Brazil and made contact with a settled indigenous community. They are believed to have fled illegal loggers and drug traffickers, but some have already contracted influenza.Newly discovered crAssphage could be the most common virus in your body. Nobody has ever seen it, and we didn't even know about it until just recently.Grizzly bears will eat an extraordinary amount of food before going into hibernation. In humans, this would be a recipe for diabetes but it isn't for the bears. Turns out there's a protein called PTEN that's responsible – and the trick is reducing its expression only in fat cells.What do you get when two scientists sequence their gut microbiome for a whole year? An amazingly detailed dataset that documents the changes our bodies go through during illness, travel and dietary changes.Being strangled during sex might be unfortunate, but being eaten by your mate afterwards would also be weird. Another reason to be glad you're not an octopus.

In unserem Sonnensystem findet gerade ein außergewöhnliches Rendezvous statt: Ein europäischer Satellit erreicht einen entenförmigen Kometen und bereitet eine Landung vor. >> Artikel zum Nachlesen: https://detektor.fm/wissen/forschungsquartett-satellit-rosetta-erreicht-komet-67pchuryumov-gerasimenko

Steve Nerlich from the Cheap Astronomy podcast gives us an update on the roller-coaster life of the ISEE-3 space probe. It was alive, then it died, then it was resurrected then it seemed dead but now it may be still alive again! Paleontologists have discovered the fossilised remains of one of the world's first known predators that lived in the sea around 520 million years ago. The fossils were detailed enough to show some of the brain structures. Researchers at UCLA have found eight types of electric bacteria - bacteria that eat and excrete electrons. The Rosetta spacecraft is approaching its target, comet 67P/Churyumov-Gerasimenko, and its latest photos reveal the comet to be, well, rubber-duckie shaped. The comet could be two bodies joined together, and this could make the planned deployment of a lander a bit complicated. A well-preserved, complete fossil skeleton of the largest known microraptorine - a flying non-avian dinosaur - has been found in China. Called Changyuraptor yangi, the dinosaur was about 1.3 metres long and weighed 4kg. And it had four wings! Scientists at Dartmouth College are looking at a parasite commonly found in cat poo, Toxoplasma gondii, in an attempt to develop a cancer vaccine. When infected by 'Toxo', the human body produces cytotoxic T cells that cancer would normally shut down. And what happens when you put snakes in microgravity? In the ultimate Snakes On A Plane experiment, scientists found snakes either attack themselves or tie themselves in knots.

Colorado's Science Fair Stars (starts at 3:18) As the end of the school year approaches for high school students, it’s a good time to celebrate the achievements and passion of students in Colorado who have excelled in science, technology, math and engineering (STEM). Two of them -- Hope Weinstein, a senior at Fairview High in Boulder, and Michael Brady, a senior at Cherry Creek High School in Greenwood Village -- were finalists at a renowned global competition last week. It’s the Intel International Science and Engineering Fair, which is a program of Society for Science & the Public. Hope and Michael talk with co-host Susan Moran about their research and their message to other students. Rosetta Comet Mission (starts at 15:16) When he's not busy volunteering with How On Earth, Joel Parker is an astronomer with the Southwest Research Institute -- and that's the hat he has on today as our in-studio guest. He joins us to talk about the European Space Agency's Rosetta mission, which will tag along with comet 67P/Churyumov-Gerasimenko as it swings nearer to the sun later this summer. Joel is the Deputy Lead Investigator for ALICE, the ultraviolet spectrometer aboard the spacecraft. He’s also the featured presenter at Cafe Scientifique tomorrow night. So think of this conversation as a preview of what you might hear if you join him tomorrow at Brooklyn’s down in Denver. Joel will give a very informal talk starting at 6:30 pm, and will try to answer all your tough questions about comets, Rosetta, or anything else. CafeSci is free and open to the public. Producer: Ted Burnham Co-Hosts: Ted Burnham, Susan Moran Engineer: Ted Burnham Listen to the show:

Yesterday, engineers at ESA's Space Operations Centre confirmed that Rosetta had successfully swung by Mars in the second of four critical gravity assists in its ten-year voyage to comet 67P Churyumov-Gerasimenko. Closest approach occurred at 3:15 AM CET at an altitude of 250 km; departure velocity was estimated to be 36 191 km/hour relative to the Sun. In addition to confirming extensive and careful operations preparations, the successful passage allowed scientists to switch on several of the spacecraft's instruments as well as the camera onboard the Philae lander to image Mars. Results will help calibrate instruments after comparison to parallel observations made by ESA's Mars Express.ESApod audio programme

On 25 February, Rosetta will swing by Mars in the second of four critical gravity assists in its ten-year voyage to comet 67P Churyumov-Gerasimenko. The upcoming manoeuvre, with Rosetta skimming Mars at 250 kilometres, is a delicate operation and a key milestone, and mission controllers and flight dynamics specialists at ESA's Space Operations Centre are in intense preparations for the early-morning event. The spacecraft will also conduct observations of Mars, primarily to help calibrate the instruments but also to gather data, which will complement those gathered by ESA's Mars Express, in a 'mini' coordinated observation campaign.ESApod video programme