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Astronomy Cast Ep. 219 - Planck Mission - REMASTER By Fraser Cain & Dr. Pamela Gay From February 7, 2011. Another mission named after a famous physicist. This time we're looking at the Planck mission, designed to study the Cosmic Microwave Background Radiation over the entire sky. Like the previous WMAP mission, this will help astronomers understand the first moments after the Big Bang. This Episode is made possible thanks to our Patrons on Patreon. Join at the Galaxy Group level or higher to be listed in our YouTube videos. This video was made possible by the following Patreon members: - BogieNet - Stephen Veit - Jeanette Wink - Siggi Kemmler - Andrew Poelstra - Brian Cagle - David Truog - Ed - David - Gerhard Schwarzer THANK YOU! - Fraser and Dr. Pamela
Show Notes: NASA Jet Propulsion Laboratory (05:15) Mentors (07:20) Building and leading teams (13:15) Comfort with uncertainty (15:30) Waleed Abdalati Origins episode (18:30) What drew Nash to JPL (19:00) Trajectories to JPL (20:00) Why you need to read sociology books (22:00) Being a Renaissance Person - curiosity across human endeavors (22:40) T-shaped people (23:00) Challenging yourself (29:45) The change in mentality that comes with public service (32:50) NASA JPL Team X (35:15) What is Team X?van Allen, von Braun, and Pickering famous picture (38:00) What networked computers did for JPL (40:30) Alfred’s contribution to Team X efficiency - paper (42:15) Three types of fun (44:10) Thinking about how you provide information (46:15) Related: see discussion of human-centered design in Rachel Young Origins episode "Murphy was an optimist” (48:00) Melanie Mitchell Origins episode (56:10) Writing (56:45) Helping Writers Become Authors podcastChildren of Tendu podcast and parallels to proposal writing Julia Cameron’s The Artist’s Way Why you need to learn about design “All endeavors of humanity are communicative endeavors" “Vision without action is a daydream, action without vision is a nightmare" “You can never be too clear” (01:05:30) Thinking in questions (01:06:00) “The people who really make it in life are not those who get the right answer, but the ones that ask the right question” Right question is the quantum leap to the right answer Lightning round (01:08:00): Book: Thinking Fast and Slow by Daniel Kahneman Passion: Gift of gab Heart sing: Broadest possible definition of product development (The Invincible Company book) Screwed up: Leading people during Planck Mission project Find guest online: Twitter @aeniiiNASA JPL 'Five-Cut Fridays’ five-song music playlist series Alfred’s playlist
Sommerfeld Theory Colloquium
The Big Bang Theory and Stephen Hawking News: Beloved Physicist Stephen Hawking passed away on March 14 at his home in Cambridge, England. He was 76. There is general relativity, which beautifully accounts for gravity and all of the things it dominates: orbiting planets, colliding galaxies, the dynamics of the expanding universe as a whole. That's big. Then there is quantum mechanics, which handles the other three forces—electromagnetism and the two nuclear forces. He meant to bridge these two and find a field of physics that can explain them both with the same laws He also did research on today’s topic, The Big Bang Theory, but let’s learn more about this Theory before we discuss his findings Born on 300-year anniversary of Galileo’s death Died on Einstein’s birthday Theory of Everything Today’s Topic: The Big Bang Theory The Big Bang Theory is currently the most widely agreed upon explanation about how the universe began. It says that at one point, all of the matter in our universe was smushed into one tiny subatomic particle, called a singularity. Something unknown caused the universe to explode or BANG and the universe inflated over the next 13.8 billion years to the cosmos that we know today. History First, an explosion in space, then something like a hundredth of a billionth of a trillionth of a trillionth of a second, it expanded. During this expansion, or inflation, the universe grew exponentially and doubled in size at least 90 times. This period was very brief, only about 10-35 seconds (that's 0.00000000000000000000000000000000001 seconds in "long-hand") but in that time it is thought that the Universe expanded by a factor of around 1060 (1 million million million million million million million million million million times!). From the Planck Mission website: "Imagine a golf ball, around 5cm in diameter with dimples around 4mm wide and 0.2mm deep. Most people would agree that a golf ball is quite bumpy. The golf ball can be thought of as the early Universe and the dimples are the tiny fluctuations in it. Now let's blow up the golf ball to the size of the Earth, an increase of around 250,000,000 times. Now we have a ball the size of the Earth, with dimples 1000km wide and 50km deep, making it much smoother than the actual Earth. Since the Universe expanded so quickly during Inflation, faster than the speed of light in fact, we can only see a tiny fraction. In fact the region we can see is, in our analogy, still only about the size of a golf ball, and is now much smoother that the golf ball was to start with." About 3 minutes after the Big Bang, the Universe was still at a temperature of aroung a billion degrees. By this time, however, the matter which makes up the Universe was fixed: about 75% hydrogen and 25% quarter helium. We still see this proportion today for the most part, though it has changed slightly over time as stars have burnt hydrogen and helium and made heavier elements. Around 400,000 years after the Big Bang, the Universe had cooled to around 3000 Kelvin, allowing atoms to form without being ripped apart by the intense radiation and allowing electrons and protons to combine, creating the first light of the universe The light in the Universe was then free the travel through space, and we see this light today as the Cosmic Microwave Background, or CMBR. Over time, the Universe has expanded,causing the wavelengths of all the light in it to get stretched out. 400 thousand - 400 million years after the Big Bang is known as the Dark Ages Stars formed around 180 million years after First Galaxies by 1 billion yaers, colliding and creating huge ones 9 billion years after; our sun formed Other theories Steady State Universe Where matter is constantly being created Pretty sure its not true Eternal Inflation It inflated early on and is still inflating today Oscillating Universe Bing Bangs and Big Crunches, also known as the Cyclic model Hawking suggests that before the Big Bang, there wasn’t nothing, that there was never nothing. Only that time was bent — "It was always reaching closer to nothing but didn't become nothing," Essentially, "there was never a Big Bang that produced something from nothing. It just seemed that way from mankind's point of perspective." Subscribe Rate Review Social Media Patreon Tagline
During our Iceland adventure, I had a chance to sit down with Dr. Paul Sutter and talk about the limits of science. Why a better version of the Planck Mission can't tell us anything else about the cosmic microwave background radiation. Support Universe Today Podcast
During our Iceland adventure, I had a chance to sit down with Dr. Paul Sutter and talk about the limits of science. Why a better version of the Planck Mission can't tell us anything else about the cosmic microwave background radiation.
AstronomyCast 219: The Planck Mission, by Fraser Cain & Dr. Pamela Gay