SPACE-TIME

We know things happen a long time ago in galaxies far far away, but how far is far exactly? And how do you measure that? ------------------------------------------------------- Join astronomer Dr. Emily Drabek-Maunder as she faces the Curators Against the Clock challenge. Curators have 5, 15 and 30 seconds to answer one of the big questions of Royal Museums Greenwich. But how will their expertise fare against the ticking of the clock? ------------------------------------------------------- Royal Museums Greenwich is comprised of the Royal Observatory, Cutty Sark, the National Maritime Museum and the Queen’s House. Learn stories of exploration, endeavour, wonder and awe at these four historic museums, all located within a UNESCO World Heritage Site.’ http://www.rmg.co.uk Facebook: https://www.facebook.com/royalmuseumsgreenwich Twitter: https://twitter.com/RMGreenwich/ Instagram: https://www.instagram.com/royalmuseumsgreenwich

Click here to explore your creativity and get 2 free months of Premium Membership: https://skl.sh/isaacarthur13 Is time travel possible, and if it is, what sort of civilizations would result? We'll explore the science that might permit it as well as the classic science fiction examples to see if they make sense. Visit our Website: http://www.isaacarthur.net Support us on Patreon: https://www.patreon.com/IsaacArthur SFIA Merchandise available: https://www.signil.com/sfia/ Social Media: 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/time-travel Episode's Narration-only version: https://soundcloud.com/isaac-arthur-148927746/time-travel-narration-only Credits: Time Travel Episode 219, Season 6 E01 Written by: Isaac Arthur Editors Darius Said Jerry Guern Keith Blockus Victoria Kelly Cover Art: Jakub Grygier https://www.artstation.com/jakub_grygier Graphics: Ken York https://www.facebook.com/YDVisual/ Sergio Botero https://www.artstation.com/sboterod?fref=gc Produced & Narrated by: Isaac Arthur Music: Lombus, "Cosmic Soup" https://lombus.bandcamp.com Aerium, "Fifth Star of Aldebaran" https://www.youtube.com/channel/UCRnUJY3l5vIJFGsY3XvW4dQ Markus Junnikkala, "Leaving the Galaxy" https://www.markusjunnikkala.com/ Stellardrone, "An Ocean of Galaxies" https://stellardrone.bandcamp.com

Figuring out that the speed of light was the ultimate speed limit of the universe is part of the late 19th-century and early 20th-century history of Physics. This is part 2 of my “history of the speed of light” series. Part 1 - How did we measure the speed of light? https://www.youtube.com/watch?v=V7PU1WN9jWY Michelson & Morley 1887 - http://www.ajsonline.org/content/s3-34/203/333.full.pdf ----- My phases of the Moon necklace and Moon earrings were gifted to me by Eclectic Eccentricity, who have a great selection of space-themed jewellery: https://eclecticeccentricity.co.uk/collections/cosmos Necklace: https://eclecticeccentricity.co.uk/products/roam-moon-phase-necklace?_pos=1&_sid=cd742dc82&_ss=r Earrings: https://eclecticeccentricity.co.uk/products/mahina-crescent-moon-studs --- 🔔 Don't forget to subscribe and click the little bell icon to be notified when I post a new video! ---- 📚 My book: "Space at the speed of light" is now available in the USA & Canada! Order your copy here: https://www.penguinrandomhouse.com/books/635406/space-at-the-speed-of-light-by-dr-becky-smethurst/ 📚 For anywhere else in the world you can buy my book here (Space: 10 Things You Should Know - same book, different title) here: http://bit.ly/SpaceDrBecky --- 🔭 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

Is it possible to go backwards through time? We travel forwards every day, but traveling back could let us change our past, visit old friends, or manipulate the timeline to our benefit... Although our knowledge of space and time remains incomplete, we can still use what we know to consider possible time machines. But what kind of paradoxes would this entail and how can we resolve them? Join us today on a special journey through time. An educational video written and presented by Professor David Kipping This video is based on research conducted at the Cool Worlds Lab at Columbia University, New York. You can now support our research program directly here: https://www.coolworldslab.com/support All music used is licensed by SoundStripe.com or through Creative Commons: ► "It's Always Darkest Before the Dawn" by Hill, licensed through SoundStripe.com: https://app.soundstripe.com/songs/7441 ► "Waking Up" by Atlas, licensed through SoundStripe.com: https://app.soundstripe.com/songs/3984 ► Cylinder Four (http://chriszabriskie.com/cylinders/) by Chris Zabriskie (http://chriszabriskie.com/); licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/by/4.0/) ► "Always Dreaming" by Caleb Etheridge, licensed through SoundStripe.com: https://app.soundstripe.com/songs/5534 ► Cylinder Two (http://chriszabriskie.com/cylinders/) by Chris Zabriskie (http://chriszabriskie.com/); licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/by/4.0/) ► "Fable" by Stephen Keech, licensed through SoundStripe.com: https://app.soundstripe.com/songs/6312 ► "Selha" by Stephen Keech, licensed through SoundStripe.com: https://app.soundstripe.com/songs/7102 Further reading and resources: ► Echeverria, F., Klinkhammer, G. & Thorne, K. S. (1991), "Billiard balls in wormhole spacetimes with closed timelike curves: Classical theory", Phys. Rev. D., 44, 1077: https://ui.adsabs.harvard.edu/abs/1991PhRvD..44.1077E/abstract ► S. Kalyana Rama & Siddhartha Sen (1994), "Inconsistent Physics in the Presence of Time Machines": https://arxiv.org/abs/gr-qc/9410031v1 ► Stephen Hawking (1992), "Chronology protection conjecture", Phys. Rev. D., 46, 603: https://ui.adsabs.harvard.edu/abs/1992PhRvD..46..603H/abstract ► Max Tegmark (1997), “On the dimensionality of space time”, CQG, 14, L69: https://arxiv.org/abs/gr-qc/9702052 Films clips used: ► The Assassination of Jesse James by the Coward Robert Ford (2007) Warner Bros ► Interstellar (2014) Paramount ► The Grey (2011) Open Road Films ► About Time (2013) Universal Pictures ► The Time Machine (2002) Dreamsworks Pictures ► Passengers (2016) Columbia Pictures ► Back to the Future (1985) Universal Pictures ► Avengers: Endgame (2018) Walt Disney Studios Motion Pictures ► Somewhere in Time (1980) Universal Pictures ► Lucy (2014) Universal Pictures ► The Matrix (1999) Warner Bros ► Immortal Beloved (1994) Columbia Pictures ► Prisoners (2013) Warner Bros ► X-Men: Days of Future Past (2014) 20th Century Fox ► Captain America: Civil War (2016) Walt Disney Studios Motion Pictures ► Inception (2010) Warner Bros ► Silver Linings Playbook (2012) The Weinstein Company ► The Dark Knight Rises (2012) Warner Bros ► Hidden Figures (2016) 20th Century Fox Television clips used: ► The Expanse (Legendary Television) ► Star Trek: The Next Generation (Paramount) ► Dr Who (BBC) ► Star Trek: Enterprise (Paramount) ► Game of Thrones (HBO) ► Genius (National Geographic) Other video clips used: ► ESO spacetime diagram https://www.spacetelescope.org/videos/heic1812b/ ► Earth orbit animation by Brad Freese: https://youtu.be/R2lP146KA5A ► Hefele Kating experiment video by Gideon Boulton: https://youtu.be/LW4NsxCglp4 ► SpaceX satellite launch: https://youtu.be/K_NFCeNrryg ► Wormhole animation by Robert Wilde: https://youtu.be/Fb4fpfPWL7k ::Playlists For Channel:: Latest Cool Worlds Videos ► http://bit.ly/NewCoolWorlds Cool Worlds Long Form Videos ► http://bit.ly/CoolWorldsEssays Cool Worlds Research ► http://bit.ly/CoolWorldsResearch Guest Videos ► http://bit.ly/CoolWorldsGuests Q&A Videos ► http://bit.ly/CoolWorldsQA Tabby's Star ► http://bit.ly/TabbysStar Science of TV/Film ► http://bit.ly/ScienceMovies ::Follow us:: SUBSCRIBE to the channel http://bit.ly/CoolWorldsSubscribe Cool Worlds Lab http://coolworlds.astro.columbia.edu Twitter https://twitter.com/david_kipping THANKS FOR WATCHING!! #TimeTravel #TimeMachine #CoolWorlds

If time travel to the future is theoretically possible... then how far ahead can we really go? In this video, Unveiled discovers what it would be like to time travel to the END OF TIME itself! What would you see? How would you feel? And would you live to tell the tale? The fate of the universe is one of the greatest mysteries there is... How will it all end? But you would have front row seats to the action... This is Unveiled, giving you incredible answers to extraordinary questions! Find more amazing videos for your curiosity here: What If the Big Bang Wasn't the Beginning? - https://www.youtube.com/watch?v=P6NK_GbfaXM What Are Black Holes Made Of? - https://www.youtube.com/watch?v=ekalyaatyb0 Are you constantly curious? Then subscribe for more from Unveiled ► https://goo.gl/GmtyPv #TimeTravel #Space #Universe #SpeedOfLight #Science #Physics #Amazing #Interesting

How was the speed of light first measured? Albert Einstein deduced it was the speed limit for everything in the universe. Is it possible to go faster? A lecture by Katherine Blundell OBE, Gresham Professor of Astronomy 02 October 2019 1PM BST https://www.gresham.ac.uk/lectures-and-events/faster-than-light The speed of light has fundamental significance.  This talk will explain how the speed of light was first measured, and how an obscure but brilliant patent clerk in Bern, Switzerland by the name of Albert Einstein deduced that the speed of light is the upper speed limit for everything in the Universe. It is even possible for things to be measured as travelling faster than the speed of light and I will explain how that is permissible and understandable in an Einsteinian worldview. #GreshamLectures #Astronomy #Lightspeed #Science #Space #Light #Universe

https://lt.org/ * What are the building blocks of our universe that everything is made of? In this video, ASTRID EICHHORN explains how her work seeks to reveal the fundamental microscopic structure of space-time. While recent pioneering experiments have confirmed aspects of Einstein’s General Theory of Relativity, this work seeks to overcome the limitations of current observational technology through theoretical investigations of the relationships between quantum space-time, quantum gravity and matter. With undoubted implications for our understanding of Dark Matter and the Standard Model of particle physics, the real-world applications of this kind of foundational research can have profound effects on all of our lives. Bio: Astrid Eichhorn was appointed associate professor at CP3-Origins at the University of Southern Denmark in 2019. Since 2016, she built up a research group at the Institute for Theoretical Physics at Heidelberg University as part of the DFG’s (Deutsche Forschungsgemeinschaft) Emmy Noether Programme. LT Video Publication DOI: https://doi.org/10.21036/LTPUB10642 https://www.thphys.uni-heidelberg.de/~eichhorn/

Time Travel has long been the holy grail for modern science... Some say we'll never be able to travel in time, while others believe we're close to achieving the impossible. But what if time travel already exists? If it's ever going to exist then surely it exists right now - right? In this video, Unveiled explores the paradox of time travel to unravel one of the greatest mysteries in the universe! This is Unveiled, giving you incredible answers to extraordinary questions! Find more amazing videos for your curiosity here: Is Time Travel Possible? - https://www.youtube.com/watch?v=LjOAE6FFVTo What If You Enter the Quantum Realm? - https://www.youtube.com/watch?v=UHKQn99Mp7Y Are you constantly curious? Are you a fiend for facts? Then subscribe for more from Unveiled ► https://goo.gl/GmtyPv #TimeTravel #Science #SciFi #DoctorWho

Thanks to LastPass for sponsoring PBS DS. You can check out LastPass by going to https://lastpass.onelink.me/HzaM/2019Q3JulyPBSspace Our universe started with the big bang. But only for the right definition of “our universe”. And of “started” for that matter. In fact, probably the Big Bang is nothing like what you were taught. A hundred years ago we discovered the beginning of the universe. Observations of the retreating galaxies by Edwin Hubble and Vesto Slipher, combined with Einstein’s then-brand-new general theory of relativity, revealed that our universe is expanding. And if we reverse that expansion far enough – mathematically, purely according to Einstein’s equations, it seems inevitable that all space and mass and energy should once have been compacted into an infinitesimally small point – a singularity. It’s often said that the universe started with this singularity, and the Big Bang is thought of as the explosive expansion that followed. And before the Big Bang singularity? Well, they say there was no “before”, because time and space simply didn’t exist. If you think you’ve managed to get your head around that bizarre notion then I have bad news. That picture is wrong. At least, according to pretty much every serious physicist who studies the subject. The good news is that the truth is way cooler, at least as far as we understand it. Check out the new Space Time Merch Store! https://pbsspacetime.com/ Support Space Time on Patreon https://www.patreon.com/pbsspacetime Hosted by Matt O'Dowd Written by Matt O'Dowd Graphics by Leonardo Scholzer Directed by Andrew Kornhaber Produced By: Kornhaber Brown Big Bang Supporters: Anton Lifshits David Nicklas Fabrice Eap Juan Benet Justin Lloyd Morgan Hough Quasar Supporters: Mark Heising Mark Rosenthal Tambe Barsbay Vinnie Falco Hypernova Supporters: Chuck Zegar Danton Spivey Donal Botkin Edmund Fokschaner Hank S John Hofmann John R. Slavik Jordan Young Joseph Salomone kkm Mark Heising Matthew Matthew O'Connor Syed Ansar Gamma Ray Burst Supporters: Adrien Hatch Alexey Eromenko Andreas Nautsch Bradley Jenkins Brandon Labonte Carlo Mogavero Daniel Lyons David Behtala DFaulk Dustan Jones Geoffrey Short James Flowers James Quintero John Funai John Pollock Jonah Jonathan Nesfeder Joseph Dillman Joseph Emison Josh Thomas Kevin Warne Kyle Hofer Malte Ubl Mark Vasile Nathan Hitchings Nick Virtue Paul Rose Ryan Jones Scott Gossett Sigurd Ruud Frivik Tim Jones Tim Stephani Tommy Mogensen Yurii Konovaliuk سلطان الخليفي

What If Stephen Hawking Had Unlimited Time? ► Subscribe: https://goo.gl/GmtyPv Professor Stephen Hawking was one of the most influential and inspiring scientists of his time. In this video, we explore Hawking's remarkable life, looking at the massive breakthroughs he made in science, his world-changing theories on everything from black holes to time travel, his tireless work to raise awareness for various charities, and his warnings about global warming, climate change and even the dangers of artificial intelligence. What if the great Stephen Hawking was given unlimited time? What do you think? Let us know in the comments, and tell us more questions you'd like us to explore! Find more mind bending videos to satisfy your curiosity here: Why the Multiverse Might be a Reality - https://www.youtube.com/watch?v=6jY7wtc5TQo What If the Speed of Light Slowed Down? - https://www.youtube.com/watch?v=ifj5Ctr8rT4 #StephenHawking #Hawking #BlackHole #Space #Science #WhatIf

Thanks to @AstroKatie (http://astrokatie.com, http://twitter.com/astrokatie) for the collaboration! Go to http://www.brilliant.org/minutephysics for free daily science puzzles Here's the original twitter thread https://twitter.com/astrokatie/status/1066526148149108736 Support MinutePhysics on Patreon! http://www.patreon.com/minutephysics Link to Patreon Supporters: http://www.minutephysics.com/supporters/ This video is about the cosmic distance scale and how we see objects farther away in space (ie at higher red shift) farther back in time because light takes time to reach us. Thus we can see not only stars and galaxies, but also the primordial stars & proto-galaxies, and even the remnants of the beginning of the universe itself: the CMB cosmic microwave background left over from the big bang. MinutePhysics is on twitter - @minutephysics And facebook - http://facebook.com/minutephysics Minute Physics provides an energetic and entertaining view of old and new problems in physics -- all in a minute! Created by Henry Reich

To support Kurzgesagt and learn more about Brilliant, go to https://www.brilliant.org/nutshell and sign up for free. The first 688 people that go to that link will get 20% off the annual Premium subscription. Are wormholes real or are they just magic disguised as physics and maths? And if they are real how do they work and where can we find them? Sources and further reading: https://authors.library.caltech.edu/9262/1/MORprl88.pdf http://www.cmp.caltech.edu/refael/league/thorne-morris.pdf OUR CHANNELS ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ German Channel: https://kgs.link/youtubeDE Spanish Channel: https://kgs.link/youtubeES HOW CAN YOU SUPPORT US? ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ This is how we make our living and it would be a pleasure if you support us! Get Merch designed with ❤ from https://kgs.link/shop Join the Patreon Bird Army 🐧 https://kgs.link/patreon DISCUSSIONS & SOCIAL MEDIA ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ Reddit: https://kgs.link/reddit Instagram: https://kgs.link/instagram Twitter: https://kgs.link/twitter Facebook: https://kgs.link/facebook Discord: https://kgs.link/discord Newsletter: https://kgs.link/newsletter OUR VOICE ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ The Kurzgesagt voice is from Steve Taylor: https://kgs.link/youtube-voice OUR MUSIC ♬♪ ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ 700+ minutes of Kurzgesagt Soundtracks by Epic Mountain: Spotify: https://kgs.link/music-spotify Soundcloud: https://kgs.link/music-soundcloud Bandcamp: https://kgs.link/music-bandcamp Youtube: https://kgs.link/music-youtube Facebook: https://kgs.link/music-facebook The Soundtrack of this video: Soundcloud: https://bit.ly/2B6EOnE Bandcamp: https://bit.ly/2MBHzyM Facebook: https://bit.ly/2GIoZlH 🐦🐧🐤 PATREON BIRD ARMY 🐤🐧🐦 ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ Many Thanks to our wonderful Patreons from http://kgs.link/patreon who support us every month and made this video possible: Big Skapinsky, Liam Wenzel, Juan Gonzalez, Grigory Sarnitsky, Brandon Cleary, Amanda Hutchings, Siddharth Amarsee, Maciamo Hay, Nick T., Gabriel Correa, Matthew McAteer, Javier Silva Calvo, javier canella, Gergely Szakács, Pernox, Alana leonhardy, Tommi Moilanen, David DiGiovanni, Jack Bernstein, Jonas Steen Nielsen, Thomas Pyke, Gizem Ozdemir, ShiroiYami, Alice Bater, Ennio Sialiti, Alexander Evans, Eric Chan, Peter Noort, Adrian Haslinger, Tomasz Różalski, Miro Cibula, Lyle Jeff, Sunil Pai, Aurélien Delaux, Piotr Pałek, Øyvind Helland, Khloudalahbaby, Nicola Larosa, Dave, Montant, Eli V, ryan oberfield, Iain Garioch, Janina Lamøy, Saurischian, Zachary Osman, Cody Douglas, Can Berk Güder, Jason Lin, Eric Lugo, Emil Hjort, Luuk Perdaems, Brandon Carraway, Zack Methven, dava, Gauthier Muguerza, Tim Andreev, Robin Gielings, Mihai Anei, Pranab Kumar Mishra, jeong-min, An, Nerijana, jongre1512, Mike Levy, David W., Jakob Stams, Linda Yancey, Leo White, John, Justin Boh, Thot, Matthew Dyet, Andrei Stefan, Patrick McKelvy, Kervan Govender, Rajiv Cruz, Peter Duncan, Ramsey Elbasheer, Zhuang Miao, Brayden Sola, frikinside, Yasmeen Mawlawi, Loic Rebillard, Nicholas Miller, Philipp Bergamin, K. Gustavo Carlos, Albin, Connor Wilson, Talal Al-Khaldi, NURO, Durham Goode, Christopher Hadley, Sean Holland, iulian constantin, Pumpk!nH34D, Douwe de Jong, Jens Baumann, Vladislav Aleynikov, Joshua Olson, Andrew Boggs, William Wu, Andrew Mckinley, Eric Burnett, Benjamin Bromberg, Barry Costa, Philippe Ryll, Barbieri Davide, Claire Baldauf, Ondrej Debreceni, Benjamin Sairanen, Elija Peterson, Eki Hassa, Ryan K. Allen, Ville Vuorela, Reinhold Dunkl, Gloria Hope, Matti Hanberg, Moritz Roell, Marco Schmidt, Trey, Jiesi Ren, Maurice Simmons, Simon Sardeson-Coe, Sam Day, Orphansmith, Noah T Blanchard, Gerald Balla, Yannick van Andel, Khaled I. Johari Help us caption & translate this video! https://www.youtube.com/timedtext_cs_panel?c=UCsXVk37bltHxD1rDPwtNM8Q&tab=2 Wormholes Explained – Breaking Spacetime

What if the future influences the past? It could, according to this new quantum theory. Special thanks to Dianna from Physics Girl for her help with this episode! If you haven’t yet, go check out her channel. She’s awesome. https://www.youtube.com/user/physicswoman This Is The Only Place Antimatter Can Survive In The Universe - https://youtu.be/XD8Q3Mb1Q4I Read More: Physicists provide support for retrocausal quantum theory, in which the future influences the past https://phys.org/news/2017-07-physicists-retrocausal-quantum-theory-future.html “Recently some physicists have been looking into this idea, called ‘retrocausality,’ because it can potentially resolve some long-standing puzzles in quantum physics.“ The Quantum Mechanics of Fate http://nautil.us/issue/9/time/the-quantum-mechanics-of-fate “Physicists as renowned as John Wheeler, Richard Feynman, Dennis Sciama, and Yakir Aharonov have speculated that causality is a two-headed arrow and the future might influence the past.” Scientists Finally Prove Strange Quantum Physics Idea Einstein Hated https://gizmodo.com/scientists-finally-prove-strange-quantum-physics-idea-e-1798433666 “That concept is also known as entanglement, and it’s what allows particles that have once interacted to share a connection regardless of the separation between them.” ____________________ Elements is more than just a science show. It’s your science-loving best friend, tasked with keeping you updated and interested on all the compelling, innovative and groundbreaking science happening all around us. Join our passionate hosts as they help break down and present fascinating science, from quarks to quantum theory and beyond. Seeker explains every aspect of our world through a lens of science, inspiring a new generation of curious minds who want to know how today’s discoveries in science, math, engineering and technology are impacting our lives, and shaping our future. Our stories parse meaning from the noise in a world of rapidly changing information. Visit the Seeker website https://www.seeker.com/videos Elements on Facebook - https://www.facebook.com/SeekerElements/ Subscribe now! http://www.youtube.com/subscription_center?add_user=dnewschannel Seeker on Twitter http://twitter.com/seeker Trace Dominguez on Twitter https://twitter.com/tracedominguez Seeker on Facebook https://www.facebook.com/SeekerMedia/ Seeker http://www.seeker.com/ This episode of Seeker was co-hosted by Trace Dominguez Written by: Victoria Barrios

In this week's QA, I wonder if we could use the speed of light to see ourselves in the past, how the Mars rovers clean their solar panels, and if aliens would infect us with their bacteria and viruses. Watch the Weekly Space Hangout: https://www.youtube.com/channel/UC0-KklSGlCiJDwOPdR2EUcg Sign up for my weekly email newsletter at: https://www.universetoday.com/newsletter What Fraser's Watching Playlist: https://www.youtube.com/playlist?list=PLbJ42wpShvmkjd428BcHcCEVWOjv7cJ1G Support us at: http://www.patreon.com/universetoday More stories at: http://www.universetoday.com/ Follow us on Twitter: @universetoday Like us on Facebook: https://www.facebook.com/universetoday Google+ - https://plus.google.com/+universetoday/ Instagram - http://instagram.com/universetoday Team: Fraser Cain - @fcain / [email protected] Karla Thompson - @karlaii / https://www.youtube.com/channel/UCEItkORQYd4Wf0TpgYI_1fw Chad Weber - weber.chad[email protected] Chloe Cain - Instagram: @chloegwen2001 Balázs Suhajda Hi Fraser! We use massive cosmic bodies to bend light and magnify distant objects, soon using them to observe exoplanets and their atmospheres as they were long ago. I wonder if it could be possible to find rays of light that have left earth long ago and through the curvature of space end up returning to earth with high enough resolution to allow us to look back into the past. Is it completely out of the question? path finder discovery I want to know who dusts off the solor panels when it gets dusty an it probably does often due to those huge dust storms , hmmmmmm🤔??🙃🤓🤔🙄 ohh👽👾😱😨😍 Schnitzel Vonlichenmenutz Imagine the virus’s and bacteria they may unintentionally bring. Could potentially be the end of all life on earth. Also, I hope they have a good immune system for our planetary virus’s and bacteria Alpha Gusta I notice that in some space launches that the space craft immediately starts to spin into another direction, I know some course correction is needed for different orbital planes and trajectories. But sometimes it seems like they turn 90 degrees. Why dont they just build launch platforms in somewhat the correct direction? Phil Metal When the galaxies merge or slam together, would it be a slow event until things start smashing into each other? Or would some crazy gravity changes rip world's apart and it be a cataclysmic show? In your opinion would it be a galactic reset, would anything survive CODELESS Enjoy your videos and Q & A's : i was wondering, with this Mission of colonizing mars in the future, there are some ideas that the domes could have water in them to shield Radiation. How much water is needed to block radiation as in the thickness or width of water to block radiation. Thanks XXCoder I was wondering if it was possible to make "bed cylinders" that is partitioned into 2 sleeping areas. With some automatic counterbalancing for mass differences, it may be enough for sleeping in gravity for better health? Jim Labbe If super earths are more massive and have greater gravity wells, might that make space travel much more difficult for intelligent life? Put differently, if we could increase the mass of the earth at what point might it create a physical constraint on space travel? Captain Ultimate G'day from Down Under! I am a new subscriber and I am really enjoy your videos Fraser, so thanks for your knowledge and all your hard work. Would there be any point or benefit to launching a telescope into orbit around a planet in the outer solar system like neptune, or even pluto? Or are they too close in regards to current telescopes to really return any befit? Matthew Kramer Hello Fraser, quick question: How do you think our advances in Machine Learning, Reinforcement Learning and A.I in general will affect space missions in the near and distant future? Greetings Matthew Jesse Dyball Could you get two BFRs joined by long cables and have them spin? Peter Granzeier Do white dwarves have habitable zones?

An exploration of whether the Fermi Paradox is truly a paradox at all and an exploration of what time frames are involved in determining that. https://www.patreon.com/johnmichaelgodier Papers: "A Probabilistic Analysis of the Fermi Paradox", Evan Solomonides and Yervant Terzian, 2016 https://arxiv.org/abs/1604.07687 Music: Cylinder Five by Chris Zabriskie is licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/by/4.0/) Source: http://chriszabriskie.com/cylinders/ Artist: http://chriszabriskie.com/

Is String Theory the final solution for all of physic’s questions or an overhyped dead end? This video was realised with the help of Dr. Alessandro Sfondrini and it was funded by SNSF under Agora Grant n. 171622 and through the NCCR SwissMAP: The Mathematics of Physics. See also our video on the black-hole information paradox: https://bit.ly/2DU6p8P OUR CHANNELS ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ German Channel: https://kgs.link/youtubeDE Spanish Channel: https://kgs.link/youtubeES HOW CAN YOU SUPPORT US? ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ This is how we make our living and it would be a pleasure if you support us! Get Merch designed with ❤ from https://kgs.link/shop Join the Patreon Bird Army 🐧 https://kgs.link/patreon DISCUSSIONS & SOCIAL MEDIA ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ Reddit: https://kgs.link/reddit Instagram: https://kgs.link/instagram Twitter: https://kgs.link/twitter Facebook: https://kgs.link/facebook Discord: https://kgs.link/discord Newsletter: https://kgs.link/newsletter OUR VOICE ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ The Kurzgesagt voice is from Steve Taylor: https://kgs.link/youtube-voice OUR MUSIC ♬♪ ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ 700+ minutes of Kurzgesagt Soundtracks by Epic Mountain: Spotify: https://kgs.link/music-spotify Soundcloud: https://kgs.link/music-soundcloud Bandcamp: https://kgs.link/music-bandcamp Youtube: https://kgs.link/music-youtube Facebook: https://kgs.link/music-facebook The Soundtrack of this video: Soundcloud: http://bit.ly/2CsAbob Bandcamp: http://bit.ly/2oHsSPZ Facebook: http://bit.ly/2qW6bY4 🐦🐧🐤 PATREON BIRD ARMY 🐤🐧🐦 ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ Many Thanks to our wonderful Patreons from http://kgs.link/patreon who support us every month and made this video possible: Flavio Storino, Alice Balcon, Hari Krishnan, Warren Wiscombe, Sara Zeglin, Asiryan Alexander, maarten sprengers, William Northern, Kerem Mimaroglu, Yana Kultysheva, Josh, Keaton Anderson, Croconaw, Peter Steinberger, Jonathan Diamond, Troy McConaghy, Paddy, Darko Sperac, Peter Burkhalter, Chris Amaris, Tyler Lovell, John Ruble, Chase Henson, Arpita Singh, Edward C.P., Andreas Edlund, Ryan Bubinski, Paul Greyson, Jerry Ding, Austin Sundquist, Daniel Link, Tim Johnson, kayleigh dreste, Johan Sjöblom, Max Stuart, Mush Rain, Andor Baranyi, Eduardas Afanasjevas, Bill Clem, Jake Smith, Stephen Woerner, Jeff Sorensen, Christopher Damsgaard, Eduardo AV, Michael Gawenka, Florian Hoedt, Lucas Nyman, Nathanael Baker, Martin Wierzyk, Mauricio Streb, Karl, Rameet Chawla, Joachim Andersen, Avinash, Erik Golden, Glenn Stoltz, Elliott Nelson, Andrew Averett, Ben Wei Help us caption & translate this video! http://www.youtube.com/timedtext_cs_p... String Theory Explained – What is The True Nature of Reality?

Go to http://brilliant.org/MinutePhysicsSpecialRelativity to learn more about spacetime diagrams and for 20% off a premium subscription to Brilliant. This video is chapter 2 in my series on special relativity, and it covers spacetime diagrams, rotational and translational symmetry of both time and space, how certain transformations preserve distances (measured in terms of a reference like a meter or second), and so on. We'll wait until the next video to talk about Lorentz transformations, relativity of velocity, minkowski diagrams, and the speed of light. Support MinutePhysics on Patreon! http://www.patreon.com/minutephysics Link to Patreon Supporters: http://www.minutephysics.com/supporters/ MinutePhysics is on twitter - @minutephysics And facebook - http://facebook.com/minutephysics And Google+ (does anyone use this any more?) - http://bit.ly/qzEwc6 Minute Physics provides an energetic and entertaining view of old and new problems in physics -- all in a minute! Created by Henry Reich

Einstein’s special theory of relativity is notorious for being easy to misuse, with the result that sometimes result in claims of paradoxes. When one digs more carefully into the theory, you find that no such paradoxes actually exist. In this video, Fermilab’s Dr. Don Lincoln describes a commonly claimed time dilation paradox and shows how to resolve it. Related videos: https://www.youtube.com/watch?v=qXxtqK7G4Uw https://www.youtube.com/watch?v=CB1QFUCga0I https://www.youtube.com/watch?v=Txv7V_nY2eg

Purpose of Disclaimer: The Disclaimer at the beginning of the video points out to the fact that all the time dilation values have been calculated using the logic mentioned in the disclaimer. The logic has been proposed by the creater of the video. However, he/she is not responsible if the actual time on these Space objects does not match with the values stated in the video. 😛 . . Time, as we know is relative. Depending upon your proximity to a massive object and your speed, time would move slower/faster for you as compared to an isolated observer who is at rest. The video tells us how much time passes on different objects in our Galaxy when one year passes on Earth. Is the difference significant or not? Watch the video to know more. Don't forget to Like, Subscribe and Comment. *Also turn on the notification bell for regular updates* Follow us on Instagram: https://www.instagram.com/astrogeekz/ We're on Facebook: https://www.facebook.com/astrogeekz/

Brian Greene moderates this fascinating program exploring the fundamental principles of Quantum Physics. Anyone with an interest in science will enjoy this thought-provoking and highly entertaining show. PARTICIPANTS: Mark Van Raamsdonk, Gerard ’t Hooft, David Wallace, Birgitta Whaley MODERATOR: Brian Greene WATCH THE TRAILER: https://youtu.be/JxhfU_fvlAM WATCH THE LIVE Q&A WITH MARK VAN RAAMSDONK: https://youtu.be/GvRNV6Gmmzk Ninety years after the historic double-slit experiment, the quantum revolution shows no sign of slowing. Join a vibrant conversation with renowned leaders in theoretical physics, quantum computation, and philosophical foundations, focused on how quantum physics continues to impact understanding on issues profound and practical, from the edge of black holes and the fibers of spacetime to teleportation and the future of computers. MORE INFO ABOUT THE PROGRAM AND PARTICIPANTS: https://www.worldsciencefestival.com/programs/computational-creativity/ This program is part of the Big Ideas Series, made possible with support from the John Templeton Foundation. - Subscribe to our YouTube Channel for all the latest from WSF - Visit our Website: http://www.worldsciencefestival.com/ - Like us on Facebook: https://www.facebook.com/worldsciencefestival/ - Follow us on Twitter: https://twitter.com/WorldSciFest TOPICS: - Brian Greene's introduction to Quantum Mechanics 00:09 - Participant Introductions 03:32 - Where do we currently stand with quantum mechanics? 05:30 - Chapter One - Quantum Basics 07:48 - The Double Slit experiment 14:18 - Chapter Two - Measurement and Entanglement 26:53 - Quantum Mechanics today is the best we have 41:27 - Chapter Three - Quantum Mechanics and Black Holes 59:07 - Black holes and Hawking Radiation 01:03:56 - Chapter Four - Quantum Mechanics and Spacetime 01:15:45 - Chapter Five - Applied Quantum 01:23:36 This program was recorded live on 6/2/17 and has been edited and condensed for our YouTube channel. Watch the original full livestream here: https://youtu.be/3qQ8r-_NdZo