Where Did the Laws of the Universe Come From? With Paul Davies
Where Did the Laws of Physics Come From?
Why is the universe just right for life?
Paul Davies joins John Michael Godier to discuss why the universe seems to be fine-tuned for life. How did the universe begin and how will it end? Paul Davies Books
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What Was the Universe Like Before the Big Bang? | Unveiled
What was it like BEFORE the universe existed? Join us... and find out! Subscribe for more from Unveiled ► https://wmojo.com/unveiled-subscribe The Big Bang Theory is the most widely followed model for the creation of the universe. It says that, at one time, all of the matter and energy in the universe was coiled up in a ball about the size of a grapefruit... until it came to life 13.8 billion years ago! But what existed BEFORE then? In this video, we find out! This is Unveiled, giving you incredible answers to extraordinary questions! 0:00 Start
0:33 Before the Big Bang
2:47 The Singularity
4:48 Ekpyrotic Scenario
5:58 Symmetrical Universe
6:52 Parent Universes
8:04 Conclusions Find more amazing videos for your curiosity here:
Are We Living in the Dark Forest? - https://youtu.be/sFvf6Elp3D0
What Will Humanity Look like in 1,000,000 Years? - https://youtu.be/fNj5Akyw49M #Space #Universe #BigBang
The NEW Crisis in Cosmology
https://www.patreon.com/pbsspacetime I have good news and bad news. Bad news first: two years ago we reported on the Crisis in Cosmology. Since then, it’s only gotten worse. And actually, the good news is also that the crisis in cosmology has actually gotten worse, which means we may be onto something! The most exciting thing for any scientist is when something they thought they knew turns out to be wrong. So it’s no wonder that many cosmologists are starting to get excited by what has become known as the Hubble tension, or the crisis in cosmology. The “crisis” is the fact that we have two extremely careful, increasingly precise measurements of how fast the universe is expanding which should agree with each other, and yet they don’t. Original Crisis in Cosmology
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How we plan to solve the "Crisis in Cosmology"
The "crisis in cosmology" has been plaguing astronomers for years now, so how are we planning to sort it out? To learn more about cosmology, head to http://brilliant.org/DrBecky and sign up for free. The first 200 people that go to that link will get 20% off an annual premium subscription. #crisisincosmology #sciencedebate Planck collaboration (2019) - https://www.aanda.org/articles/aa/full_html/2020/09/aa33886-18/aa33886-18.html
Reid, Pesce & Reiss (2019) - https://arxiv.org/pdf/1908.05625.pdf
LIGO collaboration (2017) - https://arxiv.org/pdf/1710.05835.pdf
Feeney et al. (2021) - https://arxiv.org/pdf/2012.06593.pdf 00:00 - Introduction
00:44 - What is cosmology?
01:14 - What does a model of the Universe need to explain?
02:09 - Our best current model λ-CDM
04:26 - Measuring the expansion rate of the Universe with λ-CDM
05:34 - Measuring the expansion rate of the Universe with galaxies
08:14 - THIS is the "crisis in cosmology"
09:05 - Is the data or the model the problem?
11:43 - How are we going to solve the crisis in cosmology?
14:05 - What does the future hold?
17:01 - Brilliant
18:04 - Bloopers --- 👕 Check out my merch here: https://teespring.com/stores/dr-becky --- 📚 "Space: 10 Things You Should Know" - UK Edition: http://bit.ly/SpaceDrBecky 📚 US & Canada version: "Space at the speed of light" (same book, different title, with some beautiful illustrations): https://www.penguinrandomhouse.com/books/635406/space-at-the-speed-of-light-by-dr-becky-smethurst/ 📚 German translation "Das kleine Buch vom großen Knall" : https://www.dtv.de/buch/becky-smethurst-das-kleine-buch-vom-grossen-knall-28254/ --- 🎧 Royal Astronomical Society Podcast that I co-host: podfollow.com/supermassive --- 🔔 Don't forget to subscribe and click the little bell icon to be notified when I post a new video! --
The artwork in the background is a scientifically accurate map showing the orbits of more than 18000 asteroids in the Solar System, created by Eleanor Lutz. Find out more and buy one here: https://eleanorlutz.com/mapping-18000-asteroids --- 👩🏽💻 I'm Dr Becky Smethurst, an astrophysicist at University of Oxford (Christ Church). I love making videos about science with an unnatural level of enthusiasm. I like to focus on how we know things, not just what we know. And especially, the things we still don't know. If you've ever wondered about something in space and couldn't find an answer online - you can ask me! My day job is to do research into how supermassive black holes can affect the galaxies that they live in. In particular, I look at whether the energy output from the disk of material orbiting around a growing supermassive black hole can stop a galaxy from forming stars. http://drbecky.uk.com
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Big Bang Astronomy from the Ends of the Earth
The Universe | After Dark Online
How does our understanding of the origins of the universe continue to expand and evolve? What tools and theories continue to push our understanding into further realms? Hear from Black scientists and leaders whose work is at the forefront of cosmology and essential to forming and informing humans’ deepening grasp of the science of the universe. This program features: What is dark matter made of—and is dark matter really dark? In her work, theoretical physicist Dr. Chanda Prescod-Weinstein explores axions, a type of hypothetical elementary particle, and the compelling role they may play in understanding what makes up dark matter. Tonight, she’ll share more about the nature of the axion, its possible relationship to dark matter, and some surprising insight into what dark matter really looks like. Dr. Prescod-Weinstein is an assistant professor of physics and a core faculty member in women’s studies at the University of New Hampshire. Her book The Disordered Cosmos: A Journey into Dark Matter, Spacetime, and Dreams Deferred will be released in March. (begins at 3:45) What emerging tools and instruments may support a better understanding of how the universe was formed and has evolved? As a researcher with NASA’s Astrophysics Science Division, Dr. Gregory Mosby works on observational astronomy and developing new tools. Tonight, hear from him about his work on the Nancy Grace Roman Space Telescope and the ways modeling and machine learning can support an expanded understanding of the universe. (begins at 25:40) https://www.exploratorium.edu
Something Is Heating Up The Universe
You've heard about Global Warming, but have you heard about Galactic Warming? Well scientists say it's happening as we speak. What could possibly be causing it? Learn more:
PLANCK SPACE TELESCOPE https://www.spacetv.net/planck-space-telescope/
SLOAN DIGITAL SKY SURVEY https://www.spacetv.net/sloan-digital-sky-survey/
GALAXIES https://www.spacetv.net/galaxies/
THE UNIVERSE https://www.spacetv.net/the-universe/ Sources:
https://www.eurekalert.org/pub_releases/2020-11/jhu-ghg111020.php
https://www.eurekalert.org/pub_releases/2020-11/osu-tui111020.php
https://www.sciencetimes.com/articles/28166/20201111/universe-getting-hotter-affecting-global-warming.htm Written and hosted by Cambrie Caldwell https://twitter.com/CambrieCaldwell Follow us on Twitter https://twitter.com/SPACETVnet
Join us on Facebook https://www.facebook.com/spacetv.net Credits:
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American Museum of Natural History
A. Feild (STScI)
ESO/Digitized Sky Survey 2/A. Fujii. Acknowledgement: Aniello Grado and Luca Limatola.
NASA/NASA Goddard SPACETV.NET 2021
A Brief History of the Universe - Ask a Spaceman!
The first 1000 people to use the link will get a free trial of Skillshare Premium Membership: https://skl.sh/paulmsutter02211 Full podcast episodes: http://www.askaspaceman.com
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Follow: http://www.twitter.com/PaulMattSutter and http://www.facebook.com/PaulMattSutter It’s time for school! The Astro101 series will cover some of the most important questions in astronomy. In today’s lesson, we’ll have: How did the universe begin? How will it end? What’s going on in here and how did we learn all this? I discuss these questions and more in today’s Ask a Spaceman! Follow all the show updates at http://www.askaspaceman.com, and help support the show at http://www.patreon.com/pmsutter Keep those questions about space, science, astronomy, astrophysics, and cosmology coming to #AskASpaceman for COMPLETE KNOWLEDGE OF TIME AND SPACE! Music by Jason Grady and Nick Bain. This video was sponsored by Skillshare.
Q&A 133: What's Causing the Expansion of the Universe? And More...
In this week's QA, I talk about what's driving the expansion of the Universe, how big the observable Universe is to the actual Universe, and what will happen to dogs in gravity. 00:00 Start
00:26 What's driving the expansion of the Universe?
04:01 How big is the observable Universe compared to the actual Universe?
07:25 Do people watch videos or listen to my podcasts?
10:37 Will dogs enjoy lunar gravity?
12:59 Why aren't we looking deeper in the Kuiper Belt?
15:54 What would be some good ways to explore lava tubes?
19:36 What happened to the Overwhelmingly Large Telescope?
22:48 Would space LIGO be more sensitive?
27:56 What's the most like Great Filter?
31:07 Why do we talk about distance in form of time?
35:14 Any future collaborations with Isaac Arthur?
35:58 How long will the Mars helicopter survive?
40:07 When will NASA incorporate Starship into its plans?
42:15 How dangerous is the Kessler Syndrome? 🚀 OUR WEBSITE:
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The First Billion Years of the Universe - with Emma Chapman
What happened after the Big Bang? When did the very first stars burst into life? Why are those stars were so unusual, and what they can teach us about the Universe today?
Watch the Q&A: https://youtu.be/9zxsC68PJUI
Emma's book "First Light" is available now: https://geni.us/GpAa0x Emma Chapman is currently based at Imperial College London, where she is a Royal Society Dorothy Hodgkin Fellow. Emma has spent her research career in London so far, completing her PhD and first postdoctoral position at UCL before heading off to Imperial College for a Royal Astronomical Society fellowship. Her research is in the Epoch of Reionisation, a rather off-putting name for a very exciting time in our Universe – when the lights first switched on. As those first stars formed and started flinging out high energy radiation, they formed bubbles of ionised hydrogen around them. We can observe this hydrogen today with radio telescopes and the race is on to make the first detection of the Epoch of Reionisation. Emma works mainly with the European telescope LOFAR based in the Netherlands. This talk was recorded on 1 December 2020.
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Do We Really Know the Age of the Universe? - Space Radio LIVE
NOTE: We apologize for the video occasionally freezing during this episode. There were technical/internet issues that were beyond our control. This week on Space Radio:
► Astronomers Reevaluate the Age of the Universe [https://www.space.com/universe-age-14-billion-years-old]
► Properties of Dark Matter;
► How was the Milky Way created?
► What happens if you run the Universe "backwards"?
► … and more. 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. 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, Stephen J, 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, Becky L, Colin B, Arthur, Bruce A, Steven M, Brent B, Bill E, Jim L, Tim Z, Thomas W, Linda C, Joshua, David W, Aissa F, Tom G, and Marc H. 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.
Infinity & Beyond — Episode 12: Cosmic Distances
“Space is big,” wrote Douglas Adams, and he wasn’t kidding. Familiar units of distance, like miles and kilometers, quickly become too unwieldy to use in cosmic discussions. After all, we don’t say the Empire State Building stretches 17,448 inches or describe a bacterium as measuring 0.000001 meter. Instead of ending up with similar “astronomical” figures, scientists use units like light-years, parsecs, and astronomical units to help make sense of it all. Just to get to the Moon, on average, it’s 239,000 miles (384,400 kilometers) — and that’s practically our next-door neighbor. It’s a lot farther than people think! The Sun lies some 93 million miles (150 million km) away, an expanse so large, it forms the basis of our first new unit of distance, conveniently named an astronomical unit, or AU. Astronomers often use this unit to describe distances within solar systems, between planets or companion stars. But even something as big as an astronomical unit isn’t enough for the hugeness of space. The nearest star to us, other than the Sun, is Proxima Centauri, likely part of the Alpha Centauri system. It’s about 267,000 AU away, so astronomers often turn to another unit of measurement: the light-year. This is the distance that light travels in a vacuum for one year: about 6 trillion miles (9 trillion km), or 63,000 AU. Thus, the distance to Proxima Centauri is also 4.22 light-years. In this episode of Infinity & Beyond, join host Abigail Bollenbach as she puts cosmic distances into perspective. Stay up-to-date on the latest space and astronomy news at https://astronomy.com/news. And make sure to follow us on Facebook (https://www.facebook.com/AstronomyMag...), Instagram (https://www.instagram.com/astronomy.m...), and Twitter (https://twitter.com/AstronomyMag).
The Origin Of The Universe Just Got WAY Weirder | Answers With Joe
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The Big Bang has been the accepted theory about the beginning of the universe for so long, you might think we've worked out all the kinks in it. But there are several issues with the Big Bang Theory, which has caused some cosmologists to turn to alternative ideas. The Ekpyrotic Universe, based on string theory, is one of those ideas. And it's super weird. Want to support the channel? Here's how: Patreon: http://www.patreon.com/answerswithjoe
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A New Way to Measure The Expansion of the Universe. The Cosmological Crisis Deepens.
This episode is a segment that we did in the Weekly Space Hangout talking about how astronomers are using masers (water lasers) to measure the expansion rate of the Universe. You'd think that another, independent way to measure the expansion rate of the Universe would be helpful, but it's only deepened the mystery of the cosmological crisis. Subscribe to the Weekly Space Hangout
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[email protected]Field Trip: Mapping the Universe #LearnWithMe
Join the Museum’s Director of Astrovisualization Carter Emmart and astrophysicist Jackie Faherty on a virtual field trip to the edge of the observable universe and discover how scientists are mapping space. Explore space from the safety of your couch with our playlist: https://www.youtube.com/playlist?list=PLrfcruGtplwG5sRg8FEVZRa8pOVQ8cUz_ How do we calculate the distances of stars far outside our solar system? And galaxies well beyond our Milky Way? How much of the sky has been charted and how might we fill in the gaps? The American Museum of Natural History’s Digital Universe Atlas leverages data from dozens of agencies and universities worldwide to create a digital 3D atlas of the cosmos. #LearnWithMe #Planetarium #Astrophysics #BigData #Universe ***
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Prof. Martin Rees IUCAA Colloquium, June 18th, 2020
Prof. Sir Martin Rees (Institute of Astronomy, Cambridge) Title: Progress and frustration in Cosmology Abstract: It is gratifying that some of the key numbers describing our Universe have been measured to a precision of a few percent. We are learning about the emergence and properties of galaxies, stars, planets and life -- and how this chain of events depended on these numbers. These advances have sharpened up new mysteries. Some of these will be clarified by new observations; others, such as the overall scale of the universe (and whether we inhabit a multiverse) are likely to prove frustratingly intractable.
What Happens After the Universe Ends?
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https://mailchi.mp/1a6eb8f2717d/spacetime Conformal Cyclic Cosmology is a story of the origin and the end of our universe from great mathematical physicist Sir Roger Penrose. It’s goes like this: the infinitely far future, when the universe has expanded exponentially to to an unthinkably large size, and every black hole and particle has decayed into faint radiation .... that infinite stretch of space and time is identically the SAME THING as the infinitesimal and instantaneous big bang of a new universe, and our universe is just one in an endless chain. Hosted by Matt O'Dowd
Written by Matt O'Dowd
Graphics by Leonardo Scholzer, Yago Ballarini, & Pedro Osinski
Directed by: Andrew Kornhaber
Camera Operator: Bahaar Gholipour
Executive Producers: Eric Brown & Andrew Kornhaber #space #astrophysics #universe Previous Episodes Discussed
Geometry of Causality - https://www.youtube.com/watch?v=1YFrISfN7jo
Higgs Mechanism - https://www.youtube.com/watch?v=kixAljyfdqU Special Thanks to Our Patreon Supporters Big Bang Supporters
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We Still Can't Find the First Stars in the Universe | SciShow News
Astronomers looking farther back in time than ever before are giving us a better idea of what the early universe must have been like, and we've identified another of the mysterious ultraluminous X-ray pulsars. Hosted by: Hank Green SciShow has a spinoff podcast! It's called SciShow Tangents. Check it out at http://www.scishowtangents.org
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Sources:
https://astronomy.swin.edu.au/cosmos/P/Population+III
https://kipac.stanford.edu/highlights/population-iii-stars-universes-ultimate-reclusive-pop-stars
https://aas.org/sites/default/files/2020-06/bhatawdekar_aas236.pdf.
https://sci.esa.int/web/hubble/-/hubble-makes-surprising-find-in-the-early-universe-2010
https://academic.oup.com/mnras/article/486/3/3805/5420745
https://www.haystack.mit.edu/ast/science/epoch/
https://www.wolframalpha.com/input/?i=Small+Magellanic+Cloud
https://www.eurekalert.org/pub_releases/2020-06/ras-uxs060320.php
https://www.aanda.org/articles/aa/pdf/2005/19/aa2408-04.pdf,
http://dx.doi.org/10.1093/mnras/staa1041 Images:
https://svs.gsfc.nasa.gov/12656
https://en.wikipedia.org/wiki/File:Well_known_stars_2.png
https://svs.gsfc.nasa.gov/10128
https://svs.gsfc.nasa.gov/10861
https://svs.gsfc.nasa.gov/20314
http://www.spitzer.caltech.edu/video-audio/1733-ssc2020-05v1-Spitzer-Space-Telescope-Beauty-Pass
https://en.wikipedia.org/wiki/File:Paranal_Platform_After_Sunset_(ESO).jpg
https://svs.gsfc.nasa.gov/30685
https://en.wikipedia.org/wiki/File:Magellanic_Clouds_%E2%80%95_Irregular_Dwarf_Galaxies.jpg
https://svs.gsfc.nasa.gov/11567
https://en.wikipedia.org/wiki/File:Astrosat-1_in_deployed_configuration.png
https://svs.gsfc.nasa.gov/13058
https://www.nasa.gov/centers/marshall/multimedia/photos/2003/photos03-080.html
The End of the Universe: A Conversation with Katie Mack
In a special live webcast with Perimeter Institute on May 6, 2020, theoretical cosmologist and science communicator Katie Mack — known to her many Twitter followers as @AstroKatie — answered questions about her favourite subject: the end of the universe. Mack is currently a Simons Emmy Noether Fellow at Perimeter and an Assistant Professor at North Carolina State University. Perimeter Institute (charitable registration number 88981 4323 RR0001) is the world’s largest independent research hub devoted to theoretical physics, created to foster breakthroughs in the fundamental understanding of our universe, from the smallest particles to the entire cosmos. Perimeter's outreach efforts, including this talk, are made possible in part by the support of donors like you. Be part of the equation: https://insidetheperimeter.ca/donate Subscribe for updates on future live webcasts, events, free posters, and more: https://insidetheperimeter.ca/newsletter/ Check out Perimeter's range of free, stay-at-home science resources for explorers of all ages: https://insidetheperimeter.ca/stay-at-home-science-for-explorers-of-all-ages/ facebook.com/pioutreach
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The Great Debate or How Big is the Universe?
Simon Steel(Senior Director of Education and STEM programs) talks with Seth Shostak(Senior Astronomer) about "the great debate" in the 1920s that fundamentally changed our understanding about the size of the universe.