How Many Universes Are There?
1,078,484
Published 2019-09-30
↓ More info below ↓
Sign Up on Patreon to get access to the Space Time Discord!
www.patreon.com/pbsspacetime
Check out the Space Time Merch Store
pbsspacetime.com/
The universe is big, but it’s peanuts compared to the eternally inflating multiverse. But just how many universes are there? What are they like? And most importantly, what can they tell us about … aliens?
Challenge Answer Winners
Steven Mertens
David DeLaney
Chris Lotery
Eneko
Fabien Sangouard
Ian Bonnell
*Please email your selection from the Space Time Merch Store along with your address to [email protected] with the subject line “Challenge Question Winner”
Hosted by Matt O'Dowd
Written by Matt O'Dowd
Graphics by Leonardo Scholzer
Directed by: Andrew Kornhaber
Executive Producers: Eric Brown & Andrew Kornhaber
End Credits Music by J.R.S. Schattenberg: / @jrsschattenberg
Imagine it: the observable part of our universe is 93 billion light years across, and that’s just a small fraction of the stuff created in our Big Bang. But in the eternal inflation picture, ours is just one among uncountable bubble universes. Bubbles that are continuously appearing and growing within a vastly larger spacetime that itself expands at an exponentially accelerating rate. A greater inflationary spacetime whose expansion never ends. We looked at the bizarre idea of eternal inflation in recent episodes – but we stopped short of exploring the full implications of this proposition. Those implications are, frankly, completely nuts. Some may also be true.
Big Bang Supporters:
Alexander Tamas
Anton Lifshits
David Barnholdt
David Boyer
David Nicklas
Fabrice Eap
Juan Benet
Justin Lloyd
Matt Miller
Morgan Hough
Quasar Supporters:
Mark Heising
Mark Rosenthal
Vinnie Falco
Hypernova Supporters:
Chuck Zegar
Danton Spivey
Donal Botkin
Edmund Fokschaner
Hank S
Joe Pearce
John Hofmann
John R. Slavik
Jordan Young
Joseph Salomone
Matthew
Matthew O'Connor
Syed Ansar
Gamma Ray Burst Supporters:
A.G.
Adrian Molyneux
Alec Zero
Andreas Nautsch
Bradley Jenkins
Brandon Labonte
Brian
Dan Warren
Daniel Lyons
David Behtala
DFaulk
Dustan Jones
Geoffrey Short
Greg Smith
James Flowers
James Quintero
John Funai
John Michael Kerr
John Pollock
John Robinson
Jonathan Nesfeder
Joseph Dillman
Josh Thomas
Kevin Lee
Kevin Warne
Kyle Hofer
Malte Ubl
Mark Vasile
Nick Virtue
Nick Wright
Paul Rose
Scott Gossett
Sean Warniaha
Steve Bradshaw
Tim Stephani
Tonyface
Yurii Konovaliuk
All Comments (21)
-
"Some questions spring to mind: - I mean, besides 'What?!?'" I guess he reads the comments after all.
-
Has got to be the best one yet: Some questions spring to mind. I mean, besides: “What?!?”
-
0:41 "Bubbles that are continuously appearing and growing within a vastly large, spacetime ." video ends
-
This stuff really breaks my brain, but I love it
-
Somewhere, Something Incredible Is Waiting To Be Known Carl Sagan
-
All these universes, and I'm still single.
-
Best reason to believe in alien forms of life: We exist.
-
If bubble universes could potentially have different laws of physics, what laws would describe the bubble universes that form from their collisions?
-
I love this series but I was admit it is forever over my head. I lack the technical knowledge to grasp these subjects but they fascinate me deeply.
-
Anybody else love it when there’s an episode where Matt says “Ten to the power of ten to the power of..”? I always know it’s something mind-blowing when that comes up. Ok, PBS Spacetime is very often mind-blowing, but “Ten to the power of ten to the power of..” seems to be a special treat.
-
"Some questions spring to mind ... I mean, except "What?!" made me laugh so hard, I had to rewatch that part a few times
-
“Planets only orbit the sun. Other stars have exoplanets.” Well gee. That’s a really heliocentric definition.
-
I spend more time watching videos like these than actually studying
-
now i am curious as to what two "Universes" colliding might potentially look like. how might it effect physics within the area of overlap?
-
1:59 so it IS true: our entire universe is an oil bubble floating in a jar, placed on a shelf, in an alien's child room as a science fair project that got a C- 👽
-
You're literally one of the coolest dudes I've ever seen in my life. Your wealth of knowledge is awe inspiring.
-
Again, my brain is currently melting down while simultaneously expanding at an insane rate!
-
The whole time he was talking about seconds, I kept wondering how seconds would be measured on a multi-universal scale.
-
Thanks for covering the planet definition issue in detail at the end, and giving air (finally) to the biggest problems with the definition. Great show as always.
-
I absolutely adore this channel, I'm often amazed by the content. However, this particular video blew my mind.
