Podcasts about cosmic explorer

Mit Lichtgeschwindigkeit durchqueren sie das Universum und stauchen und strecken dabei Raum und Zeit: Gravitationswellen. Mehr als hundert Jahre lang haben Physikerinnen und Physiker über ihre Existenz spekuliert, bis es im Jahr 2015 erstmals gelang, Gravitationswellen nachzuweisen. Welche Signale seitdem gemessen wurden, was sie uns über das Universum verraten und wie Gravitationswellen in Zukunft noch genauer untersucht werden könnten, berichtet Frank Ohme vom Max-Planck-Institut für Gravitationsphysik in Hannover in dieser Folge.

Since the discovery of the first binary black-hole merger in 2015, analytical and numerical solutions to the relativistic two-body problem have been essential for the detection and interpretation of more than 100 gravitational-wave signals from compact-object binaries. Future experiments will detect black holes at cosmic dawn, probe the nature of gravity and reveal the composition of neutron stars with exquisite precision. Theoretical advances (of up to two orders of magnitude in the precision with which we can predict relativistic dynamics) are needed to turn gravitational-wave astronomy into precision laboratories of astrophysics, cosmology, and gravity. In this talk, I will discuss recent advances in modeling the two-body dynamics and gravitational radiation, review the science that accurate waveform models have enabled with LIGO-Virgo gravitational-wave observations, and highlight the theoretical challenges that lie ahead to fully exploit the discovery potential of increasingly sensitive detectors on the ground, such as the Einstein Telescope and Cosmic Explorer, and in space, such as the Laser Interferometer Space Antenna (LISA).

Hold on tight and prepare for an astronomical surprise that will leave you breathless. Brace yourself for a mind-bending twist in the world of gravitational wave detection and cosmic events. Get ready to witness a discovery so profound, it will shatter our understanding of the universe. But here's the catch: what if this groundbreaking revelation is not what we expect? Stay tuned to find out, as we embark on a cosmic journey that will challenge everything we thought we knew. In this episode, you will be able to: · Explore the groundbreaking advancements in gravitational wave detection and uncover the secrets of cosmic events. · Discover how a galaxy with a strong magnetic field can provide clues to the formation of stars and deepen our understanding of magnetic fields. · Uncover the mysterious Tharsis volcanic region on Mars and its potential role in the formation of water, shedding light on the geological factors that shaped the planet. · Understand the importance of polarization in astronomy and how it can be used as a powerful tool in observations, revealing hidden details about celestial objects. · Dive into the controversial realm of dark matter and modified Newtonian gravity, and explore alternative theories that challenge our current understanding of the universe. Imagine a future where we can detect a million neutron star mergers and hundreds of thousands of black hole collisions every year. The possibilities are mind-boggling. - Andrew Dunkley Tharsis Volcanic Region Connection Investigating the potential correlation between Martian volcanic activity and the Hellas impact could shed light on Mars's geological history and water formation. The link, though hypothetical, could provide astronomers valuable data on the effects of such impacts on seismic activities and the potential subsequent development of life-supporting conditions. This exploration further underscores the need for advanced research, expert consultations, and comprehensive scrutiny of existing theories to answer intricate questions about our universe. The resources mentioned in this episode are: · Check out the new gravitational wave detector, Cosmic Explorer, being developed by MIT. Learn more about its improved sensitivity and potential for detecting a million neutron star mergers and hundreds of thousands of black hole collisions. · Stay updated on the progress of the Cosmic Explorer project as they work towards building a 40-kilometer long laser interferometer for detecting gravitational waves. · Explore the possibilities of Lisa, the Laser Interferometer Space Antenna, a project by the European Space Agency that aims to place mirrors over 100 km apart in space to detect gravitational waves with even greater precision. · Consider the impact of gravitational wave astronomy, which offers a new window into the universe and has the potential to revolutionize our understanding of space and time. · Keep an eye out for future announcements regarding the location of the Cosmic Explorer detector and the funding and development of Lisa. · Stay informed about the latest advancements in gravitational wave research and the exciting discoveries that lie ahead. · Engage with the Space Nuts podcast to join the conversation and ask questions about gravitational waves and other space-related topics. · Subscribe to the Space Nuts podcast to receive regular updates and never miss an episode.This show is part of the Spreaker Prime Network, if you are interested in advertising on this podcast, contact us at https://www.spreaker.com/show/2631155/advertisement

Constraints on compact dark matter from lensing of gravitational waves for the third-generation gravitational wave detector by Huan Zhou et al. on Tuesday 11 October Since the first gravitational wave (GW) event from binary black hole (BBH) was detected by LIGO-Virgo, GWs have become a useful probe on astrophysics and cosmology. If compact dark matter (DM) objects e.g. primordial black holes, contribute a significant fraction of dark matter at wide mass range, they will cause microlensing in the GW signals with long wavelengths that are distinct from the lensing effects of electromagnetic signals from astrophysical objects. In this paper, we apply the lensing effect of GW from BBH to derive constraints on the abundance of compact DM for the Cosmic Explorer, a third-generation ground-based GW detector. We firstly consider two channels of formation of BBH that contribute to low and high redshift GW sources, including the astrophysical origin BBH scenario, and the primordial origin BBH scenario. Secondly, comparing with the method of optical depth, we use the Bayesian analysis to derive constraints on the abundance of compact DM with different mass function of lens taken into consideration. For a null search with $1000$ detected GW events of BBH, we find that the abundance of compact DM could be constrained to $lesssim0.1%$ in the mass range $geq500~M_{odot}$ at $68%$ confidence level. In addition, if a GW event lensed by a compact DM object with $M_{rm l}in[100~M_{odot},300~M_{odot}]$ is detected in $100$ detected GW events of BBH, we can derive that the estimation of the abundance of compact DM is from $2.3%$ to $25.2%$ in this mass range with the Bayesian analysis. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2206.13128v3

Constraints on compact dark matter from lensing of gravitational waves for the third-generation gravitational wave detector by Huan Zhou et al. on Tuesday 11 October Since the first gravitational wave (GW) event from binary black hole (BBH) was detected by LIGO-Virgo, GWs have become a useful probe on astrophysics and cosmology. If compact dark matter (DM) objects e.g. primordial black holes, contribute a significant fraction of dark matter at wide mass range, they will cause microlensing in the GW signals with long wavelengths that are distinct from the lensing effects of electromagnetic signals from astrophysical objects. In this paper, we apply the lensing effect of GW from BBH to derive constraints on the abundance of compact DM for the Cosmic Explorer, a third-generation ground-based GW detector. We firstly consider two channels of formation of BBH that contribute to low and high redshift GW sources, including the astrophysical origin BBH scenario, and the primordial origin BBH scenario. Secondly, comparing with the method of optical depth, we use the Bayesian analysis to derive constraints on the abundance of compact DM with different mass function of lens taken into consideration. For a null search with $1000$ detected GW events of BBH, we find that the abundance of compact DM could be constrained to $lesssim0.1%$ in the mass range $geq500~M_{odot}$ at $68%$ confidence level. In addition, if a GW event lensed by a compact DM object with $M_{rm l}in[100~M_{odot},300~M_{odot}]$ is detected in $100$ detected GW events of BBH, we can derive that the estimation of the abundance of compact DM is from $2.3%$ to $25.2%$ in this mass range with the Bayesian analysis. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2206.13128v3

Detection and estimation of the cosmic dipole with the Einstein Telescope and Cosmic Explorer by S. Mastrogiovanni et al. on Monday 26 September One of the open issues of the standard cosmological model is the value of the cosmic dipole measured from the Cosmic Microwave Background (CMB), as well as from the number count of quasars and radio sources. These measurements are currently in tension, with the number count dipole being 2-5 times larger than expected from CMB measurements. This discrepancy has been pointed out as a possible indication that the cosmological principle is not valid. In this paper, we explore the possibility of detecting and estimating the cosmic dipole with gravitational waves (GWs) from compact binary mergers detected by the future next-generation detectors Einstein Telescope and Cosmic Explorer. We model the expected signal and show that for binary black holes, the dipole amplitude in the number count of detections is independent of the characteristics of the population and provides a systematic-free tool to estimate the observer velocity. We introduce techniques to detect the cosmic dipole from number counting of GW detections and estimate its significance. We show that a GW dipole consistent with the amplitude of the dipole in radio galaxies would be detectable with $>3sigma$ significance with a few years of observation ($10^6$ GW detections) and estimated with a $16%$ precision, while a GW dipole consistent with the CMB one would require at least $10^7$ GW events for a confident detection. We also demonstrate that a total number $N_{rm tot}$ of GW detections would be able to detect a dipole with amplitude $v_o/c simeq1/sqrt{N_{rm tot}}$. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2209.11658v1

Detection and estimation of the cosmic dipole with the Einstein Telescope and Cosmic Explorer by S. Mastrogiovanni et al. on Monday 26 September One of the open issues of the standard cosmological model is the value of the cosmic dipole measured from the Cosmic Microwave Background (CMB), as well as from the number count of quasars and radio sources. These measurements are currently in tension, with the number count dipole being 2-5 times larger than expected from CMB measurements. This discrepancy has been pointed out as a possible indication that the cosmological principle is not valid. In this paper, we explore the possibility of detecting and estimating the cosmic dipole with gravitational waves (GWs) from compact binary mergers detected by the future next-generation detectors Einstein Telescope and Cosmic Explorer. We model the expected signal and show that for binary black holes, the dipole amplitude in the number count of detections is independent of the characteristics of the population and provides a systematic-free tool to estimate the observer velocity. We introduce techniques to detect the cosmic dipole from number counting of GW detections and estimate its significance. We show that a GW dipole consistent with the amplitude of the dipole in radio galaxies would be detectable with $>3sigma$ significance with a few years of observation ($10^6$ GW detections) and estimated with a $16%$ precision, while a GW dipole consistent with the CMB one would require at least $10^7$ GW events for a confident detection. We also demonstrate that a total number $N_{rm tot}$ of GW detections would be able to detect a dipole with amplitude $v_o/c simeq1/sqrt{N_{rm tot}}$. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2209.11658v1

Sensitivity of Neutron Star Observations to Three-nucleon Forces by Andrea Sabatucci et al. on Sunday 25 September Astrophysical observations of neutron stars have been widely used to infer the properties of the nuclear matter equation of state. Beside being a source of information on average properties of dense matter, however, the data provided by electromagnetic and gravitational wave (GW) facilities are reaching the accuracy needed to constrain, for the first time, nuclear dynamics in dense matter. In this work we assess the sensitivity of current and future neutron star observations to directly infer the strength of repulsive three-nucleon forces, which are key to determine the stiffness of the equation of state. Using a Bayesian approach we focus on the constraints that can be derived on three-body interactions from binary neutron star mergers observed by second and third-generation of gravitational wave interferometers. We consider both single and multiple observations. For current detectors at design sensitivity the analysis suggests that only low mass systems, with large signal-to-noise ratios (SNR), allow to reliably constrain the three-body forces. However, our results show that a single observation with a third-generation interferometer, such as the Einstein Telescope or Cosmic Explorer, will constrain the strength of the repulsive three-body potential with exquisite accuracy, turning third-generation GW detectors into new laboratories to study the nucleon dynamics. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2206.11286v2

This week I had the privilege of chatting with Dr. Brittany Kamai about her research into how to improve gravitational wave detectors – as well as how we can each generate gravitational waves. We also discussed how she became a driving force behind the #ShutDownSTEM movement. Brittany is Native Hawaiian, an astrophysicist, athlete, author, mentor, and advocate for creating a better world. She is on a mission to help enhance our fundamental understanding of the universe and does so by weaving together every aspect of who she is.As an experimentalist, Brittany's research focuses on improving gravitational wave detectors with novel technology ideas. She is advancing studies of seismic and acoustic metamaterials on a path to improve the ground-based detectors, namely LIGO and Cosmic Explorer. With increased sensitivity, we will gather deeper astrophysical observations to enable precision tests of cosmology, General Relativity, and stellar evolution.Brittany cares deeply about how we do science and infuses the aloha spirit into her practice of science. She advocates on national and international advisory boards to build towards a more equitable and inclusive field of astrophysics. She is the co-founder of #ShutDownSTEM and the Society of Indigenous Physicists.Dr. Kamai has received numerous awards during her career including as a National Academy of Sciences' Kavli Frontiers of Science Fellow, Ford Foundation Dissertation Fellow, National Science Foundation Graduate Research Fellow, among many others.Currently, Dr. Kamai is a Heising-Simons Foundation Postdoctoral scholar with a joint appointment between the University of California, Santa Cruz and Caltech.Be sure to follow Brittany on Twitter (@cosmojellyfish) and Instagram (@cosmojellyfish). You can also learn more about her by visiting her website.Join the show recording every Thursday at 8pm ET by leaving a voicemail at www.SpaceRadioShow.com.Support the show on Patreon.Follow on Twitter | Facebook | Instagram | YouTube.Big thanks to my top Patreon supporters this month: Justin G, Matthew K, Chris L, Barbara K, Duncan M, Corey D, Justin Z, Neuterdude, Nate H, Andrew F, Naila, Aaron S, Scott M, Rob H, David B, Frank T, Tim R, Alex P, Tom Van S, Mark R, Alan B, Craig B, Richard K, Steve P, Dave L, Chuck C, Stephen M, Maureen R, Stace J, Neil P, lothian53 , COTFM, Stephen S, Ken L, Debra S, Alberto M, Matt C, Ron S, Joe R, Jeremy K, David P, Norm Z, Ulfert B, Robert B, Fr. Bruce W, Catherine R, Nicolai B, Sean M, Edward K, Callan R, Darren W, JJ_Holy, Tracy F, Tom, Sarah K, Bill H, Steven S, Jens O, Ryan L, Ella F, Richard S, Sam R, Thomas K, James C, Jorg D, R Larche, Syamkumar M, John S, Fred S, Homer V, Mark D, Brianna V, Colin B, Bruce A, Steven M, Brent B, Bill E, Jim L, Tim Z, Thomas W, Linda C, Joshua, David W, Aissa F, Tom G, Marc H, Avery P, and Scott M!!Produced by Nancy Graziano.Cheese for today's tasting proudly provided by Dom's Cheese Shop.Hosted by Paul M. Sutter, astrophysicist and the one and only Agent to the Stars.

This week I had the privilege of chatting with Dr. Brittany Kamai about her research into how to improve gravitational wave detectors – as well as how we can each generate gravitational waves. We also discussed how she became a driving force behind the #ShutDownSTEM movement. Brittany is Native Hawaiian, an astrophysicist, athlete, author, mentor, and advocate for creating a better world. She is on a mission to help enhance our fundamental understanding of the universe and does so by weaving together every aspect of who she is.As an experimentalist, Brittany’s research focuses on improving gravitational wave detectors with novel technology ideas. She is advancing studies of seismic and acoustic metamaterials on a path to improve the ground-based detectors, namely LIGO and Cosmic Explorer. With increased sensitivity, we will gather deeper astrophysical observations to enable precision tests of cosmology, General Relativity, and stellar evolution.Brittany cares deeply about how we do science and infuses the aloha spirit into her practice of science. She advocates on national and international advisory boards to build towards a more equitable and inclusive field of astrophysics. She is the co-founder of #ShutDownSTEM and the Society of Indigenous Physicists.Dr. Kamai has received numerous awards during her career including as a National Academy of Sciences' Kavli Frontiers of Science Fellow, Ford Foundation Dissertation Fellow, National Science Foundation Graduate Research Fellow, among many others.Currently, Dr. Kamai is a Heising-Simons Foundation Postdoctoral scholar with a joint appointment between the University of California, Santa Cruz and Caltech.Be sure to follow Brittany on Twitter (@cosmojellyfish) and Instagram (@cosmojellyfish). You can also learn more about her by visiting her website.Join the show recording every Thursday at 8pm ET by leaving a voicemail at www.SpaceRadioShow.com.Support the show on Patreon.Follow on Twitter | Facebook | Instagram | YouTube.Big thanks to my top Patreon supporters this month: Justin G, Matthew K, Chris L, Barbara K, Duncan M, Corey D, Justin Z, Neuterdude, Nate H, Andrew F, Naila, Aaron S, Scott M, Rob H, David B, Frank T, Tim R, Alex P, Tom Van S, Mark R, Alan B, Craig B, Richard K, Steve P, Dave L, Chuck C, Stephen M, Maureen R, Stace J, Neil P, lothian53 , COTFM, Stephen S, Ken L, Debra S, Alberto M, Matt C, Ron S, Joe R, Jeremy K, David P, Norm Z, Ulfert B, Robert B, Fr. Bruce W, Catherine R, Nicolai B, Sean M, Edward K, Callan R, Darren W, JJ_Holy, Tracy F, Tom, Sarah K, Bill H, Steven S, Jens O, Ryan L, Ella F, Richard S, Sam R, Thomas K, James C, Jorg D, R Larche, Syamkumar M, John S, Fred S, Homer V, Mark D, Brianna V, Colin B, Bruce A, Steven M, Brent B, Bill E, Jim L, Tim Z, Thomas W, Linda C, Joshua, David W, Aissa F, Tom G, Marc H, Avery P, and Scott M!!Produced by Nancy Graziano.Cheese for today’s tasting proudly provided by Dom’s Cheese Shop.Hosted by Paul M. Sutter, astrophysicist and the one and only Agent to the Stars.

Jane is one of the most notable Vietnamese American astronomers of our time. With her PhD advisor at MIT, she discovered the Kuiper Belt, vastly increasing the number of known objects in the solar system and winning the Kavli price in 2012. Jane is an alum of Stanford University, UCLA and MIT, and was a professor at Harvard University.> Overseas Vietnamese> Jane Luu

Episode 23 Music for Space Travelers Lingering Sounds from the Atomic Age   Playlist Hamilton O'Hara And Charlie Dobson Featuring Satellite Singers and Orchestra, Directed by, written by Jim Timmens, “With A Great Big Noise Like Thunder (Rocket Into Space),” from Journey to the Moon and More about Outer Space (1974, Golden Records). Excerpt. Eric Siday, “Challenge of Space” from “The Ultra Sonic Perception” (1961 Conroy). Magnetic tape music and effects by Eric Siday for this album of library music for broadcast. The Tornadoes, “Telstar” from The Sounds Of The Tornadoes (1962 London), written and produced by Joe Meek. The record was named after the Telstar communications satellite which was launched into orbit on July 10, 1962. It featured the Clavioline. Toru Hatano, “Solaris” from Space Adventure (1978 Mu Land). Musical Instruments: KORG Polyphonic Ensemble 1000, KORG Polyphonic Ensemble "Orchestra" 2000, KORG Synthesizer 800DV, KORG Synthesizer 770, Rhythm Machine-mini pops 120P, Drums, Electric Guitar, Strings Ensemble. Tom Dissevelt, “Moon Maid” from Song of the Second Moon (1968 Limelight). This was a North American reissue of a track from 1962 called “Drifting” recorded in the Netherlands at the Philips electronic music laboratory. Dick Raaijmakers, “The Ray Makers” from Song of the Second Moon (1968 Limelight). This was a North American reissue of a track from 1962 called “Mechanical Motions” recorded in the Netherlands at the Philips electronic music laboratory. The US song title is a play on the last name of the composer, which is pronounced “Ray-makers.” Hugues Dufourt, Ensemble D'Instruments Électroniques De L'Itinéraire, Peter Eötvös, “Saturne, Part C (1978),” from Saturne (1980 Sappho). The work was conceived for an ensemble of wind instruments (12 performers), a group of percussion (6 performers) and an ensemble of electrical instruments (4 performers). Saturne was recorded in the Espace de Projection of the IRCAM centre Pompidou on 1st and 2nd December 1979. The first public performance of the work was made on the same place on the 3rd December 1979. Composed by Hugues Dufourt. Ensemble D'Instruments Électroniques De L'Itinéraire, electric guitar and synthesizer, Claude Pavy, François Bousch. Peter Huse, “Space Play (1969)” from Carrefour (Musique, Électro-Acoustique/Electroacoustic Music, Canada) (1972, Radio Canada International). Made in the Sonic Research Studio at Simon Fraser University. Huse was assistant director of the World Soundscape Project around this time. About this work he said, “Science fiction cinema taught me to regard all sounds and physical space as materials for music.” This play of sound in space was created using magnetic tape composition. Eric Siday, “Galaxy” from “The Ultra Sonic Perception” (1961 Conroy). Magnetic tape music and effects by Eric Siday for this album of library music for broadcast. John Keating, “Earthshine” from Space Experience 2 (1975 EMI). Produced by John Keating. Keyboards by Francis Monkman. All electronic instruments by ARP including 2600, Odysseynsemble, Pro Soloist, String Ensemble. Claude Dubois, “Une Guitare Des Ondes Et Leur Machine” from Fable D'espace (1978 Pingouin). Music and lyrics, produced by Claude Dubois; Synthesizer, Jean-Yves Labat; Drums, John Wilcox; Guitar, Percussion, Synthesizer, Engineer, John Holbrook; Piano, Clavinet, Bass, Electric Piano Richard Bell. Spirit, “Space Child,” from Twelve Dreams of Dr. Sardonicus (1970 Epic). Composer, keyboards, Moog Synthesizer, John Locke; vocals, guitar, Randy California; vocals, percussion, Jay Ferguson; drums, percussion, Ed Cassidy; bass, vocals, Mark Andes; produced by David Briggs. Lothar and the Hand People, “Space Hymn” from “Space Hymn” (1969 Capitol). ''All electronic music on this album was created and realized by the Hand People on Moog Synthesizer and Lothar, the Theremin.'' Lothar and the Hand People: John Emelin, Kim King, Paul Conly, Rusty Ford, Tom Flye. Written by Tom Flye. Produced by Nickolas Venet. Sun Ra, “Cosmic Explorer (1970)” excerpt, from Nuits De La Fondation Maeght Volume 1 (1971 Shandar). “Intergalactic instruments played by Sun Ra.” Recorded live at Saint Paul de Vence, France, 3/5 August 1970. Compositions by Sun Ra. Minimoog solos by Sun Ra. Percussion by Nimrod Hunt, Lex Humphries, and John Goldsmith. I've included over eight minutes of this 20-minute piece. Isao Tomita, “The Sea Named ‘Solaris' (Bach, Three-Part Invention No. 2 in C Minor-Chorale)," from Kosmos (1978 RCA). This is the complete version of the work that was shortened for use with the Cosmos television series and various greatest hits albums. " Music electronically created by Isao Tomita. Vangelis, “Pulstar” from Albedo 0.39 (1976 RCA). Keyboards, synthesizers, drums, bass, Vangelis. Speaking Clock: Post Office Telecommunications. The term “albedo” refers to the reflecting power of a planet or other non-luminous body. Isao Tomita, “The Earth - A Hollow Vessel” (Tomita: “Dororo”), from The Bermuda Triangle (1979 RCA). Music electronically created by Isao Tomita. Isao Tomita, “The Song Of Venus (Prokofiev: Violin Concerto No. 1, First Movement),” from The Bermuda Triangle (1979 RCA). Music electronically created by Isao Tomita. Archive Mix (two tracks played at the same time). Dick Raaijmakers, “Song of the Second Moon” from Song of the Second Moon (1968 Limelight). Recorded in the Netherlands at the Philips electronic music laboratory in 1962. Sun Ra, “The Star Gazers” (1970)” from Nuits De La Fondation Maeght Volume 1 (1971 Shandar). “Intergalactic instruments played by Sun Ra.” Recorded live at Saint Paul de Vence, France, 3/5 August 1970. Compositions by Sun Ra. Synthesizer [Moog], piano, electric piano, organ [electric], Sun Ra; vocal by Verta Grosvenor.

In this episode the Rocket N00b answers some model rocketry questions - some beginner's questions commonly asked on online forums, as well as a couple questions sent to him through social media. "What's the Best Glue?" Yes, we know. This question gets asked a LOT online, and some rocketeers get tired of seeing it. But it's a good sign - it means there are new people entering the hobby all the time. That's good for us, as it means more people to support our vendors of kits and motors, as well as greater awareness of this safe and awesome hobby. The long answer is on the show (the N00b does tend to ramble). The short answer: for most model rocketry applications, you want to use white or yellow glue. Brand is pretty unimportant - pick one you like. The bond formed between paper and wood with these glues is stronger than the materials themselves. If a fin breaks off, it's not the glue that failed - it's probably that the body tube's paper has ripped off, or a fin has snapped at the root. Here's a video sent to the N00b by Kirk G. showing a strength test of various white and yellow glues. Obviously the construction technique here is quite different from what you'd be doing when building a model rocket, but it does illustrate the point that these glues are plenty strong. Here's the link to the Titebond page showing the differences between Titebond I, II, and III. And here's a quick video from Titebond comparing the three glues. We also talk about epoxy, CA or super glue, plastic cement, glue sticks, and finally, hot glue (DO NOT USE HOT GLUE). The plastic cement the N00b mentioned (but couldn't remember the name) was Plastruct Plastic Weld. eRockets.biz The rockets the N00b mentioned during our sponsor segment - eRockets.biz - were by New Way. You can look at all the New Way kits eRockets carries by clicking here. "Do Engines/Motors Go Bad?" A lot of times, people will have rocket motors from a decade ago or more. Many people on the forums ask if they'll still be good. The fact is that model rocket motors, whether they are black powder or composite motors, do not have an expiration date. The important thing is how they're stored. If they've gone through a lot of hot and cold temperature cycles over the years, the propellant grains can crack, making them more prone to catastrophic motor failures, or CATOs. But people have flown 30-40 year old motors with no problems. Some composite propellants, such as White Lightning or White Thunder propellants, can have some surface oxidation on them, making them harder to light, but that's about it. Again, temp cycling may be a problem, but if properly stored, they don't really "go bad." If you're not sure, you can always soak old motors in water and dispose of them, and get new ones. Or, heck, fly 'em. That's what minimum safe distances are for! (Click here to see the Model Rocket Safety Code.) "How Do You Fill the Seam Between Two Body Tubes?" Some kits come with two short body tubes, instead of one long one, and you're supposed to join them together with a tube coupler. A follower on Instagram asked the Rocket N00b, "How do you fill in the seam so it looks like a single tube?" It can be done easily. But the first thing to ask yourself is if you actually want to do that. There are two good reasons not to fill in that joint. The first is if the rocket is to be painted two colors, and the color separation coincides with the length of the body tubes. Here's one of the N00b's favorite Estes rockets, the Cosmic Explorer. The top is black and the bottom white. If you paint the rocket first, with the top black and bottom white, and only glue the tubes together at the very end, you'll have a perfect color separation - a straight line, no bleed through of the black paint onto the white - and because of the color difference, you won't see the seam. The second reason is you might want to convert the rocket into a payload carrying vehicle.

是非一緒にYouTubeを見ましょう。 Perfume公式チャンネルがあるよ。 今回は「COSMIC EXPLORER」編です。 FLASHのMVは撮影が過酷だったようで、翌日ものすごい筋肉痛になったそうです。 Sweet Refrainは衣装も振り付けも可愛くておすすめしたい。3人で輪になって阿波踊りみたいに踊るとこが好き。 Pick Me UpのMV内で着ているお洋服（衣装じゃない方）の一部は伊勢丹で販売しておりました。 また懲りずに別日にやります。（真顔） #Perfume #ひとり語り #テンション高め #2020あぶら聞かれてない

Transcript -- Infra-red satellites. The DIRBE experiment on NASA's Cosmic Explorer opened a new window into the Milky Way.

Transcript -- Infra-red satellites. The DIRBE experiment on NASA's Cosmic Explorer opened a new window into the Milky Way.

Infra-red satellites. The DIRBE experiment on NASA's Cosmic Explorer opened a new window into the Milky Way.

Infra-red satellites. The DIRBE experiment on NASA's Cosmic Explorer opened a new window into the Milky Way.