GRAVITY

Sign Up on Patreon to get access to the Space Time Discord! https://www.patreon.com/pbsspacetime​ We know that gravity must cause clocks to run slow on the basis of logical consistency. And we know that gravity DOES cause clocks to run slow based on many brilliant experiments. But I never explained WHY or HOW gravity causes the flow of time to slow down. And I’m not going to explain it now - because in a sense it’s not true. Gravity does NOT warp the flow of time. It’s the other way around - the warping of time causes gravity. Check out the Space Time Merch Store https://pbsspacetime.com/​​​ Sign up for the mailing list to get episode notifications and hear special announcements! https://tinyurl.com/yx9cusk5​​​ Hosted by Matt O'Dowd Written by Matt O'Dowd Graphics by Leonardo Scholzer, Yago Ballarini, & Pedro Osinski GFX Visualizations: Katherine Kornei Directed by Andrew Kornhaber Assistant Producer: Setare Gholipour Executive Producers: Eric Brown & Andrew Kornhaber Sound of Pulsars https://www.parkes.atnf.csiro.au/people/sar049/eternal_life/supernova/pulsars.html Special Thanks to Our Patreon Supporters Big Bang Sponsors Rick DeWitt Sandy Wu Matthew Miller Sean Maddox Brodie Rao Scott Gray Ahmad Jodeh Radu Negulescu Alexander Tamas Morgan Hough Juan Benet Fabrice Eap Mark Rosenthal David Nicklas Quasar Sponsor Hank S Christina Oegren Mark Heising Vinnie Falco Hypernova Sponsors william bryan Paul Stehr-Green Leo Emerson muOn Marketing Russell Pope Ben Delo L. Wayne Ausbrooks Nicholas Newlin Mark Matthew Bosko Drew Hart Jason Finn Антон Кочков Alec S-L Julian Tyacke John R. Slavik Mathew Danton Spivey Donal Botkin John Pollock Edmund Fokschaner Joseph Salomone Matthew O'Connor chuck zegar Jordan Young m0nk John Hofmann Timothy McCulloch Gamma Ray Burst Supporters Ben Campbell Lawrence Tholl, DVM Faraz Khan Almog Cohen Alex Edwards Nick Ádám Kettinger Sylvain Leduc Anthony Kahng MD3 Endre Pech Daniel Jennings Cameron Sampson Pratik Mukherjee Geoffrey Clarion Nate Adrian Posor Darren Duncan Lily kawaii Russ Creech Jeremy Reed Magistrala Хемус [Kybrit] Derek Davis Eric Webster Steven Sartore DrJYou David Johnston J. King Michael Barton Christopher Barron James Ramsey Justin Jermyn Mr T Andrew Mann Jeremiah Johnson fieldsa eleanory Peter Mertz Kevin O'Connell Richard Deighton Isaac Suttell Devon Rosenthal Oliver Flanagan Dawn M Fink Bleys Goodson Darryl J Lyle Robert Walter Bruce B Ismael Montecel Andrew Richmond Simon Oliphant Mirik Gogri David Hughes Christopher Hartnett Mark Daniel Cohen Brandon Lattin Yannick Weyns Nickolas Andrew Freeman Shane Calimlim Tybie Fitzhugh Robert Ilardi Astaurus Eric Kiebler Craig Stonaha Martin Skans Michael Conroy Graydon Goss Frederic Simon Tonyface John Robinson A G Kevin Lee Adrian Hatch Yurii Konovaliuk John Funai Cass Costello Geoffrey Short Bradley Jenkins Kyle Hofer Tim Stephani Luaan AlecZero Cody Malte Ubl King Zeckendorff Nick Virtue Scott Gossett Martin J Lollar Dan Warren Patrick Sutton John Griffith Daniel Lyons DFaulk Kevin Warne Andreas Nautsch Brandon labonte

Sign Up on Patreon to get access to the Space Time Discord! https://www.patreon.com/pbsspacetime There’s a deep connection between gravity and time - gravitational fields seem to slow the pace of time in what we call gravitational time dilation. And today we’ll explore the origin of this effect. And ultimately, we’ll use what we learn to understand how curvature in time - this gradient of time dilation - can be thought of as the true source of the force of gravity. #space​ #generalrelativity #einstein Check out the Space Time Merch Store https://pbsspacetime.com/​ Sign up for the mailing list to get episode notifications and hear special announcements! https://tinyurl.com/yx9cusk5​ Hosted by Matt O'Dowd Written by Matt O'Dowd Graphics by Leonardo Scholzer, Yago Ballarini, & Pedro Osinski Directed by Andrew Kornhaber Assistant Producer: Setare Gholipour Executive Producers: Eric Brown & Andrew Kornhaber Special Thanks to Our Patreon Supporters Big Bang Supporters Sandy Wu Matthew Miller Clinton Robinson Sean Maddox Brodie Rao Scott Gray Ahmad Jodeh Radu Negulescu Alexander Tamas Morgan Hough Juan Benet Fabrice Eap Mark Rosenthal David Nicklas Quasar Supporters Hank S Christina Oegren Mark Heising Vinnie Falco Hypernova Supporters William Bryan Leo Emerson muOn Marketing Russell Pope Ben Delo L. Wayne Ausbrooks Nicholas Newlin Mark Matthew Bosko Jason Finn Антон Кочков Alec S-L Julian Tyacke John R. Slavik Mathew Danton Spivey Donal Botkin John Pollock Edmund Fokschaner Joseph Salomone chuck zegar Jordan Young m0nk John Hofmann Timothy McCulloch Gamma Ray Burst Supporters Faraz Khan Almog Cohen Alex Edwards Nick Ádám Kettinger Sylvain Leduc Matthew Harlow Anthony Kahng MD3 Endre Pech Daniel Jennings Cameron Sampson Pratik Mukherjee Geoffrey Clarion Nate Adrian Posor Darren Duncan Lily kawaii Russ Creech Jeremy Reed Magistrala Хемус [Kybrit] Derek Davis Eric Webster Steven Sartore DrJYou David Johnston J. King Michael Barton James Ramsey Justin Jermyn Mr T Andrew Mann Jeremiah Johnson fieldsa eleanory Peter Mertz Kevin O'Connell Richard Deighton Isaac Suttell Devon Rosenthal Oliver Flanagan Dawn M Fink Bleys Goodson Darryl J Lyle Robert Walter Bruce B Ismael Montecel Andrew Richmond Simon Oliphant Mirik Gogri David Hughes Christopher Hartnett Mark Daniel Cohen Brandon Lattin Yannick Weyns Nickolas Andrew Freeman Brian Blanchard Shane Calimlim Tybie Fitzhugh Robert Ilardi Astaurus Eric Kiebler Craig Stonaha Martin Skans Michael Conroy Graydon Goss Frederic Simon Tonyface John Robinson A G Kevin Lee Adrian Hatch Yurii Konovaliuk John Funai Cass Costello Geoffrey Short Bradley Jenkins Kyle Hofer Tim Stephani Luaan AlecZero Cody Malte Ubl King Zeckendorff Nick Virtue Scott Gossett Martin J Lollar Dan Warren Patrick Sutton John Griffith Daniel Lyons DFaulk Kevin Warne Andreas Nautsch Brandon labonte

Start listening with a 30-day Audible trial and your first audiobook is free. Visit http://www.audible.com/isaac or text "isaac" to 500-500. Colonizing space and settling the minor planets and asteroids may mean adjusting to much lower levels of gravity, or micro-gravity, what sort of biological and cultural adaptations might that require of humanity? Visit our Website: http://www.isaacarthur.net Support us on Patreon: https://www.patreon.com/IsaacArthur Facebook Group: https://www.facebook.com/groups/1583992725237264/ Reddit: https://www.reddit.com/r/IsaacArthur/ Twitter: https://twitter.com/Isaac_A_Arthur on Twitter and RT our future content. SFIA Discord Server: https://discord.gg/53GAShE Listen or Download the audio of this episode from Soundcloud: Episode's Audio-only version: https://soundcloud.com/isaac-arthur-148927746/zero-gravity-civilizations Episode's Narration-only version: https://soundcloud.com/isaac-arthur-148927746/zero-gravity-civilizations-narration-only Credits: Zero-Gravity Civilizations Science & Futurism with Isaac Arthur Episode 276; February 4, 2021 Produced & and Narrated by Isaac Arthur Written by: Isaac Arthur Jerry Guern https://www.youtube.com/watch?v=mxgArWbEhZg Script Editors: S. Kopperud Jason Burbank Graphics: Bryan Versteeg http://spacehabs.com Darth Biomech https://www.artstation.com/darth_biomech Fishy Tree https://www.deviantart.com/fishytree/ Jeremy Jozwik https://www.artstation.com/zeuxis_of_losdiajana Justin Dixon Ken York https://www.facebook.com/YDVisual/ Sergio Botero https://www.artstation.com/sboterod?fref=gc Steve Bowers https://www.orionsarm.com Udo Schroeter Music Courtesy of Epidemic Sound http://epidemicsound.com/creator

DESI (Dark Energy Spectroscopic Instrument) Legacy Imaging Surveys data was used to locate 1200 new gravitational lenses. It "approximately doubling the number of known lenses," according to the National Science Foundation's Noirlab. Credit: KPNO/CTIO/NOIRLab/NSF/AURA/Legacy Imaging Survey, D. Munizaga, P. Marenfeld, Hubble Space Telescope/Chandra X-ray Observatory. Music: zero-project - The Lower Dungeons (zero-project.gr).

Mercury’s path through our solar system is, well, a little eccentric, and some of its movements were a mystery astronomers couldn’t explain for a long time. Then, in the early 20th century, Einstein reran the numbers and proved a whole lot more! This episode is sponsored by Awesome Socks Club, a sock subscription for charity. Go to http://awesomesocks.club to sign up between now and December 11th to get a new pair of fun socks each month in 2021. 100% of after-tax profit will go to decrease maternal and child mortality in Sierra Leone, which is one of the most dangerous places to be pregnant in the world. Hosted by: Caitlin Hofmeister SciShow has a spinoff podcast! It's called SciShow Tangents. Check it out at http://www.scishowtangents.org ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Huge thanks go to the following Patreon supporters for helping us keep SciShow free for everyone forever: Marwan Hassoun, Jb Taishoff, Bd_Tmprd, Harrison Mills, Jeffrey Mckishen, James Knight, Christoph Schwanke, Jacob, Matt Curls, Sam Buck, Christopher R Boucher, Eric Jensen, Lehel Kovacs, Adam Brainard, Greg, Ash, Sam Lutfi, Piya Shedden, KatieMarie Magnone, Scott Satovsky Jr, charles george, Alex Hackman, Chris Peters, Kevin Bealer ---------- Like SciShow? Want to help support us, and also get things to put on your walls, cover your torso and hold your liquids? Check out our awesome products over at DFTBA Records: http://dftba.com/scishow ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow ---------- Sources: https://aether.lbl.gov/www/classes/p10/gr/PrecessionperihelionMercury.htm https://link.springer.com/article/10.1134%2FS1028335819120073 http://122.physics.ucdavis.edu/course/cosmology/sites/default/files/files/Shapiro-PRL.pdf https://ui.adsabs.harvard.edu/abs/2015AGUFM.P34A..09S/abstract (https://cddis.nasa.gov/lw14/docs/papers/sci7b_jcm.pdf) https://arxiv.org/pdf/1705.04397.pdf https://sci-hub.do/10.1103/PhysRevLett.13.789 https://astrobites.org/2018/03/19/testing-the-limits-of-gravity-at-mercury/ https://www.nature.com/articles/s41467-017-02558-1 https://phys.org/news/2016-12-strong-gravity-earth.html https://www.science.org.au/curious/space-time/gravity https://youtu.be/UG4Jz9rNzj8 https://courses.lumenlearning.com/astronomy/chapter/tests-of-general-relativity/ https://www.universetoday.com/56157/gravity-equation/ Image Sources: https://svs.gsfc.nasa.gov/13425 https://commons.wikimedia.org/wiki/File:Urbain_Le_Verrier.jpg https://commons.wikimedia.org/wiki/File:Perihelion_precession_of_Mercury_de.svg https://www.nasa.gov/sites/default/files/images/354324main_mercurywest_messenger_big_full.jpg https://www.istockphoto.com/vector/sun-and-earth-19-century-scientific-illustration-gm488917826-74444791 https://www.loc.gov/pictures/item/2014712249/ https://commons.wikimedia.org/wiki/File:Mercury_black_background.png https://bit.ly/2IyFPcY https://commons.wikimedia.org/wiki/File:MESSENGER_-_spacecraft_at_mercury_-_atmercury_lg.jpg

Hi Spacecats, I'm Dr Maggie Lieu and welcome to my channel, where you can find all things space, astronomy and physics! In this week's video, I talk the 3 kinds of gravitational lensing - strong lensing, weak lensing and micro lensing Spacemog merchandise: www.maggielieu.com/shop Extra reading: Bartelmann 2010 https://arxiv.org/abs/1010.3829 Media credits: Microlensing: ESA/NASA/Bennett Microlensing exoplanets: NASA SGFC/CI Lab variable star: NASA/ESA/Kornmesser If you enjoyed the video, please consider by liking, sharing and subscribing! I'm also on: twitter: https://twitter.com/space_mog instagram: https://instagram.com/space_mog/ facebook: https://facebook.com/spacemog/

Gravity is the natural phenomenon of a perceived attractive force experienced between bodies of mass. We take it for granted, while it holds us to the Earth, keeps the Moon in orbit around the Earth, and the planets around the Sun. Tonight Chris Benton will outline the valuable insights and descriptions of gravity given by Galileo, Newton and Einstein used to explain what gravity is and how it works. Galileo dropped balls from the Tower of Pisa and ramps concluding gravity accelerates objects of different mass by the same amount, known as the Equivalence Principle. Newton had the insight to realise the force of gravity that makes things fall to the ground on Earth is the same force responsible for the orbital motion of the planets and moons in the Solar System leading to his Universal Law of Gravitation. Einstein expanded on the Equivalence Principle to develop his General Theory of Relativity involving mass warping spacetime to explain gravity. It successfully predicts black holes, the bending of light and slowing of clocks in the presence of matter, and other phenomena. We look forward to you all coming along to an easy to understand, in-depth explanation of these concepts before hearing John Wishart speak, who has an interest in quantum gravity. John will describe how, at microscopic levels, General Relativity breaks down, leading to new exciting theories involving quantum mechanics. You should not miss this presentation, which has something for everyone!

We're not done with gravity yet - General Relativity hasn't had the final say. Go to http://brilliant.org/DrBecky and sign up for free. The first 200 people that go to that link will get 20% off the annual premium subscription. 00:00 - Video Introduction 01:00 - A brief history of gravity 01:59 - Einstein's theory of General Relativity 06:21 - Problems in Cosmology and why we care 08:46 - How do we come up with new theories of gravity? 09:23 - Starting with an observation e.g. MOND 12:20 - Adding an extra field/force 14:12 - Adding extra dimensions e.g. string theory 16:25 - Conclusions 19:09 - Bloopers Thanks to Dr Oliver Tattersal, an expert on modified gravity theories for helping me with the content of this video: https://www2.physics.ox.ac.uk/contacts/people/tattersall Here are the review papers that he sent my way to get me started for those who want a deep dive (note: written for the academic community - you may prefer to read Pedro Ferreira's book 'The Perfect Theory' which is written for a public audience: https://www.amazon.co.uk/dp/B00CTMAAN4/ref=dp-kindle-redirect?_encoding=UTF8&btkr=1) Ferreira (2019) - https://arxiv.org/pdf/1902.10503.pdf Berti et al. (2015) - https://arxiv.org/pdf/1501.07274.pdf Clifton et al. (2012) - https://arxiv.org/pdf/1106.2476.pdf And BONUS - a fairly recent review on String Theory from Mukhi (2011) - https://arxiv.org/pdf/1110.2569.pdf -- 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 ---- 📚 "Space: 10 Things You Should Know": http://bit.ly/SpaceDrBecky 📚 US & Canada version: "Space at the speed of light" (same book, different title): 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/ --- 🔔 Don't forget to subscribe and click the little bell icon to be notified when I post a new video! --- 🔭 Royal Astronomical Society podcast that I’m co-hosting 😱 🥳- podfollow.com/supermassive --- 📹 Dr. Becky also presents videos on Sixty Symbols: https://www.youtube.com/user/sixtysymbolsand Deep Sky Videos: https://www.youtube.com/user/DeepSkyVideos --- 👩🏽‍💻 Dr Becky Smethurst is an astrophysicist researching galaxies and supermassive black holes at Christ Church at the University of Oxford. http://drbecky.uk.com https://rebeccasmethurst.co.uk

It’s been 120 years since Henry Cavendish measured the gravitational constant with a pair of lead balls suspended by a wire. The fundamental nature of gravity still eludes our best minds - but those secrets may be revealed by turning back to the Cavendish experiment. That steampunk contraption may even reveal the existence of extra dimensions of space. Sign Up on Patreon to get access to the Space Time Discord! https://www.patreon.com/pbsspacetime Check out the Space Time Merch Store https://pbsspacetime.com/ Sign up for the mailing list to get episode notifications and hear special announcements! https://tinyurl.com/yx9cusk5 Hosted by Matt O'Dowd Written by Katie McCormick & 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 #gravity Special Thanks to Our Patreon Supporters Big Bang Supporters Alexander Tamas David Nicklas Fabrice Eap Juan Benet Morgan Hough Radu Negulescu Quasar Supporters Christina Oegren Mark Heising Vinnie Falco Hypernova Supporters William Bryan Chuck Zegar Danton Spivey Donal Botkin Edmund Fokschaner Hank S John Hofmann John Pollock John R. Slavik Jordan Young Joseph Salomone Julian Tyacke Mathew Matthew O'Connor Syed Ansar Timothy McCulloch Gamma Ray Burst Supporters A G Adrian Hatch AlecZero Andreas Nautsch Andrew Richmond Bradley Jenkins Brandon labonte Brandon Lattin Brian Blanchard Cass Costello Craig Stonaha Dan Warren Daniel Lyons David Bethala David Hughes DFaulk Eric Kiebler Frederic Simon Geoffrey Short Graydon Goss Greg Smith Jennifer Crosley John Funai John Griffith John Robinson Josh Thomas Justin Waters Kevin Lee Kevin Warne Kyle Hofer Malte Ubl Mark Daniel Cohen Michael Conroy Mirik Gogri Nick Virtue Nick Wright Nickolas Andrew Freeman Patrick Sutton Paul Rose Protius Protius Robert Ilardi Scott Gossett Sean Warniaha Shane Calimlim Simon Oliphant Steve Bradshaw Tatiana Vorovchenko Tim Stephani Tonyface Tybie Fitzhugh Yannick Weyns Yurii Konovaliuk

Full podcast episodes: http://www.askaspaceman.com Support: http://www.patreon.com/pmsutter Follow: http://www.twitter.com/PaulMattSutter and http://www.facebook.com/PaulMattSutter What was Newton’s genius? Why was his work so controversial? Why are his laws of motion so radical? 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.

I wrote a foreword for this awesome Sci-Fi book here: https://amzn.to/3aGrg0I Get a Wonderful Person shirt: https://teespring.com/stores/whatdamath Alternatively, PayPal donations can be sent here: paypal.me/whatdamath Hello and welcome! My name is Anton and in this video, we will talk about newly discovered gravitational waves that came from the direction of Betelgeuse star and some other new discoveries about the unusual star. Detection report: https://gracedb.ligo.org/superevents/S200114f/view/ Support this channel on Patreon to help me make this a full time job: https://www.patreon.com/whatdamath Space Engine is available for free here: http://spaceengine.org Enjoy and please subscribe. Twitter: https://twitter.com/WhatDaMath Facebook: https://www.facebook.com/whatdamath Twitch: http://www.twitch.tv/whatdamath Bitcoins to spare? Donate them here to help this channel grow! 1GFiTKxWyEjAjZv4vsNtWTUmL53HgXBuvu The hardware used to record these videos: CPU: https://amzn.to/2LZFQCJ Video Card: https://amzn.to/2M1W26C Motherboard: https://amzn.to/2JYGiQQ RAM: https://amzn.to/2Mwy2t4 PSU: https://amzn.to/2LZcrIH Case: https://amzn.to/2MwJZz4 Microphone: https://amzn.to/2t5jTv0 Mixer: https://amzn.to/2JOL0oF Recording and Editing: https://amzn.to/2LX6uvU Thank you to all Patreon supporters of this channel Specifically, great thanks to the following members: Morrison Waud Vlad Manshin Mark Teranishi TheHuntress Ralph Spataro Albert B. Cannon Lilith Dawn Greg Lambros adam lee Gabriel Seiffert Henry Spadoni J Carter Jer Silver surfer Konrad Kummli Nick Dolgy UnexpectedBooks.com Mario Rahmani George Williams Shinne Jakub Glos Johann Goergen Jake Salo LS Greger Lyndon Riley Lauren Smith Michael Tiganila Russell Sears Vinod sethi Dave Blair Robert Wyssbrod Randal Masutani Michael Mitsuda Assaf Dar Sagol Liam Moss Timothy Welter MD Barnard Rabenold Gordon Cooper Tracy Burgess Douglas Burns Jayjay Volz Anataine Deva Kai Raphahn Sander Stols Bodo Graßmann Daniel Charles Smith Daniel G. Eugene Sandulenko gary steelman Max McNally Michael Koebel Sergio Ruelas Steven Aiello Victor Julian Castillo xyndicate Honey Suzanne Lyons Olegas Budnik Dale Andrew Darling Niji Peter Hamrak Matthew Lazear Alexander Afanasyev Anton Newman Anton Reed

Full podcast episodes: http://www.askaspaceman.com Support: http://www.patreon.com/pmsutter Follow: http://www.twitter.com/PaulMattSutter and http://www.facebook.com/PaulMattSutter How did String Theory get started? What has made the idea so popular over the decades? Can we ever truly have a theory of quantum gravity? What is supersymmetry, the landscape, and the AdS/CFT Correspondence? What do holograms have to do with this? How many dimensions do we live in? Why does String Theory have such a hard time making predictions? How are we supposed to judge a theory that isn’t done yet? It’s a non-stop String Theory bonanza as 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.

You can buy Universe Sandbox 2 here: http://amzn.to/2yJqwU6 Or get a shirt: https://teespring.com/stores/whatdamath Hello and welcome! My name is Anton and in this video, we will talk about a discovery of a new planet called Mascara-4b that was discovered using a new method known as Gravity Darkening. Paper: https://arxiv.org/pdf/1911.05025.pdf Support this channel on Patreon to help me make this a full time job: https://www.patreon.com/whatdamath Space Engine is available for free here: http://spaceengine.org Enjoy and please subscribe. Twitter: https://twitter.com/WhatDaMath Facebook: https://www.facebook.com/whatdamath Twitch: http://www.twitch.tv/whatdamath Bitcoins to spare? Donate them here to help this channel grow! 1GFiTKxWyEjAjZv4vsNtWTUmL53HgXBuvu The hardware used to record these videos: CPU: https://amzn.to/2LZFQCJ Video Card: https://amzn.to/2M1W26C Motherboard: https://amzn.to/2JYGiQQ RAM: https://amzn.to/2Mwy2t4 PSU: https://amzn.to/2LZcrIH Case: https://amzn.to/2MwJZz4 Microphone: https://amzn.to/2t5jTv0 Mixer: https://amzn.to/2JOL0oF Recording and Editing: https://amzn.to/2LX6uvU Thank you to all Patreon supporters of this channel Specifically, great thanks to the following members: Morrison Waud Vlad Manshin Mark Teranishi TheHuntress Daniel Rosvall Ralph Spataro Lilith Dawn Albert B. Cannon Greg Lambros adam lee Jer Henry Spadoni Nick Dolgy Konrad Kummli UnexpectedBooks.com J Carter Gabriel Seiffert Shinne George Williams Jakub Glos Johann Goergen Lyndon Riley LS Greger Jake Salo Michael Tiganila Lauren Smith Olegas Budnik Dave Blair Sander Stols Kai Raphahn Sergio Ruelas Arikkat Unnikrishnan Steven Becky Tracy Burgess Gordon Cooper Steve Wotton Jayjay Volz Anataine Deva Honey Suzanne Lyons Daniel Coleman Matthew Lazear xyndicate Steven Aiello

Full podcast episodes: http://www.askaspaceman.com Support: http://www.patreon.com/pmsutter Follow: http://www.twitter.com/PaulMattSutter and http://www.facebook.com/PaulMattSutter How did String Theory get started? What has made the idea so popular over the decades? Can we ever truly have a theory of quantum gravity? What is supersymmetry, the landscape, and the AdS/CFT Correspondence? What do holograms have to do with this? How many dimensions do we live in? Why does String Theory have such a hard time making predictions? How are we supposed to judge a theory that isn’t done yet? It’s a non-stop String Theory bonanza as 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.

Sign Up on Patreon to get access to the Space Time Discord! https://www.patreon.com/pbsspacetime Check out the Space Time Merch Store https://pbsspacetime.com/ It’s time we talked about loop quantum gravity. What exactly is it? What are the loops? And can it really defeat string theory in our quest for a Theory of Everything? Hosted by Matt O'Dowd Written by Graeme Gossel & Matt O'Dowd Graphics by Leonardo Scholzer Directed by: Andrew Kornhaber Executive Producers: Eric Brown & Andrew Kornhaber The holy grail of physics is to connect our understanding of the tiny scales of atoms and subatomic particles with that of the vast scales of planets, galaxies, and the entire universe. To connect quantum physics with Einstein’s general theory of relativity. Our search for a theory of quantum gravity is a century old, and we’ve talked quite a bit about it already, including what’s probably the lead contender - string theory. But string theory isn’t the only game in town - or so some physicists believe. There may be another way to reconcile the physics of the tiny and the gigantic - another way to a theory of quantum gravity that avoids a lot of conceptual baggage like tiny wiggling strings made of coiled up extra dimensions. That other way would be loop quantum gravity, and today we’re going to learn exactly what it is. Special Thanks to Our Patreon Supporters Big Bang Supporters: David Barnholdt David Boyer David Nicklas Fabrice Eap Juan Benet matt miller Morgan Hough Quasar: Mark Heising Mark Rosenthal Vinnie Falco Hypernova: chuck zegar Danton Spivey Donal Botkin Edmund Fokschaner Hank S joe pearce John Hofmann John R. Slavik Jordan Young Joseph Salomone Mathew Matthew O'Connor Syed Ansar Gamma Ray Burst: A G Adrien Molyneux AlecZero Andreas Nautsch Bradley Jenkins Brandon labonte Brian Dan Warren Daniel Lyons David Bethala DFaulk Frederic Simon Geoffrey Short Graydon Goss Greg Smith James Flowers John Funai John Griffith John Michael Kerr John Pollock John Robinson Jonathan Nesfeder Joseph Dillman Josh Thomas Kevin Lee Kevin Warne Kyle Hofer Malte Ubl Nick Virtue Nick Wright Paul Rose Scott Gossett Sean Warniaha Tim Stephani Tonyface Yurii Konovaliuk

AstroInformatics 2019 Conference: AstroInformatics for Large Projects http://astroinformatics2019.org/

AstroInformatics 2019 Conference: AstroInformatics for Large Projects http://astroinformatics2019.org/

The Universe started in the Big Bang and ever since then space has been expanding - increasing the distance between galaxies ever since. Galaxy mergers are also very common though - so how does this happen if galaxies are always moving apart from each other? #bigquestions My book ' Space: 10 Things You Should Know' is out NOW worldwide (except for US & Canada - more info soon) you can find it in your local bookshop or order it here: http://bit.ly/SpaceDrBecky ----------- Follow me on Twitter: https://twitter.com/drbecky_ And on Instagram: https://www.instagram.com/drbecky_s/ Don't forget to subscribe and click the little bell icon to be notified when I post a new video! --------- Dr Becky Smethurst is an astrophysicist researching galaxies and supermassive black holes at Christ Church at the University of Oxford. http://drbecky.uk.com

One hundred years ago this month, observations performed during a total solar eclipse proved for the first time the gravitational bending of light predicted by Albert Einstein’s new theory of gravity, general relativity. In this video, Günther Hasinger, ESA Director of Science, reflects on this historic measurement that inaugurated a century of exciting experiments, investigating gravity on Earth and in space and proving general relativity in ever greater detail. On Earth, we deal with gravity every day. We feel it, we fight it, and – more importantly – we investigate it. Space agencies such as we routinely launch spacecraft against our planet’s gravity, and sometimes these spacecraft borrow the gravity of Earth or other planets to reach interesting places in the Solar System. We study the gravity field of Earth from orbit, and fly experiments on parabolic flights, sounding rockets and the International Space Station to examine a variety of systems under different gravitational conditions. On the grandest scales, our space science missions explore how gravity affects planets, stars and galaxies across the cosmos and probe how matter behaves in the strong gravitational field created by some of the Universe’s most extreme objects like black holes. Copyright: ESA Credits: ESA/CESAR (solar eclipse sequence); ESO/M. Kornmesser (black hole); Royal Astronomical Society (negative photo of the 1919 solar eclipse); ESA/Hubble, NASA (gravitationally lensed quasar); ESO/Gravity Consortium/L. Calçada (black hole simulation) ★ Subscribe: http://bit.ly/ESAsubscribe and click twice on the bell button to receive our notifications. Check out our full video catalog: http://bit.ly/SpaceInVideos Follow us on Twitter: http://bit.ly/ESAonTwitter On Facebook: http://bit.ly/ESAonFacebook On Instagram: http://bit.ly/ESAonInstagram On Flickr: http://bit.ly/ESAonFlickr We are Europe's gateway to space. Our mission is to shape the development of Europe's space capability and ensure that investment in space continues to deliver benefits to the citizens of Europe and the world. Check out http://www.esa.int/ESA to get up to speed on everything space related. Copyright information about our videos is available here: http://www.esa.int/spaceinvideos/Terms_and_Conditions #ESA #SpaceScience #Gravity

Do string theory and loop quantum gravity consider retro-causality or quantum entanglement? Did the universe start with the Big Bang? Jim Baggott answers audience questions following his talk. Subscribe for regular science videos: http://bit.ly/RiSubscRibe Watch the talk: https://youtu.be/dW7J49UTns8 Jim Baggott is an award-winning science writer. He trained as a scientist, completing a doctorate in chemical physics at the University of Oxford in the early 80s, before embarking on post-doctoral research studies at Oxford and at Stanford University in California. This Q&A was filmed at the Ri on 12 February 2019. --- A very special thank you to our Patreon supporters who help make these videos happen, especially: Darren Jones, Dave Ostler, David Lindo, Elizabeth Greasley, Greg Nagel, Ivan Korolev, Lester Su, Osian Gwyn Williams, Radu Tizu, Rebecca Pan, Robert Hillier, Roger Baker, Sergei Solovev and Will Knott. --- The Ri is on Patreon: https://www.patreon.com/TheRoyalInstitution and Twitter: http://twitter.com/ri_science and Facebook: http://www.facebook.com/royalinstitution and Tumblr: http://ri-science.tumblr.com/ Our editorial policy: http://www.rigb.org/home/editorial-policy Subscribe for the latest science videos: http://bit.ly/RiNewsletter