Is The Universe Finite?

Thanks to Brilliant for supporting PBS. Learn more at: https://www.brilliant.org/spacetime Uploaded 02-12-19PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateSPACEThe universe is big, really, really big. Although according to a new paper, it may literally be infinitely smaller than we previously thought.Sign Up on Patreon to get access to the Space Time Discord! https://www.patreon.com/pbsspacetimeCheck out the Space Time Merch Storehttps://pbsspacetime.com/Hosted by Matt O'DowdWritten by Matt O'DowdGraphics by Leonardo Scholzer and Adriano LealDirected by: Andrew KornhaberExecutive Producers: Eric Brown and Andrew Kornhaber End Credits Music by J.R.S. Schattenberg: https://www.youtube.com/channel/UCRl6-nb4iOnsij-vnpAjp0QEvery time you walk out the door, light from the Big Bang strikes your face, enters your eyes. This is the cosmic microwave background radiation - the left-over heat-glow from the very early universe. We can’t see this microwave light with our eyes, but we can catch it with even a simple radio antenna. As soon as we became aware of its existence we’ve been feverishly building better and better devices to collect it. Why? Because it encodes so many secrets. And within this light, a group of scientists have just found evidence of the limits of space. A clue that our universe may be actually be finite in size. Today on Space Time Journal Club we’ll delve into the Nature Astronomy paper that just reported this: Planck evidence for a closed Universe and a possible crisis for cosmology by Eleonora Di Valentino, Alessandro Melchiorri, and Joe Silk.Special Thanks to Our PatreonsBig BangAlexander TamasAndrew and BrennaCraig StonahaDavid BarnholdtDavid NicklasFabrice EapJohn SJuan BenetMatt MillerMorgan HoughQuasarMark HeisingMark RosenthalVinnie FalcoHypernovaChuck ZegarDanton SpiveyDonal BotkinEdmund FokschanerHank SJohn HofmannJohn PollockJohn R.