Mapping the Multiverse

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This is a map of the multiverse. Or in physics-ese, it’s the maximally extended Penrose diagram of a Kerr spacetime. And in english: when you solve Einstein’s equations of general relativity for a rotating black hole, the universe does not come to an abrupt halt at the bottom of the gravitational pit. Instead, a path can be traced out again but you do not end up in the universe that you started in. Like I said, it’s a map of the multiverse.

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 #multiverse

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[TheTexas]

I'm disappointed that the ring singularity wasn't called a "ringularity"

[AndrewJensenDV]

I feel like every time we see a Penrose diagram in Spacetime, it is slightly larger than the previous one.

[leonardogoulart]

"Multiverse cartography..."
This is gonna be one of those hard mode episodes, isn't it?

[derptomistic]

*Before watching*
"Yeah, I think I'll understand a little of this..."
*After watching*
"I can feel the warp overtaking me... IT IS A GOOD PAIN!"

[thisflyingpotato]

6:51 "Our balls, and the geodesics they follow, rebound and travel back out." -Matt O'Dowd, 2020

[GiomDe]

"this may sound fun, but there's the inconvinient fact of your utter obliteration" got a real chuckle outta me

[kevindave]

"Our balls, and the geodesics they follow, rebound and travel back out." Haha, you tease!

[enaidealukal]

This is an especially great video, even by PBS-ST standards.. I've been waiting for this one since pt 1, and it didn't disappoint. Love the stuff on the inner structure of the Kerr black hole especially, there's next to no information about this online that doesn't require a graduate-level (or higher) understanding of math/physics to even be able to read.

[spoony]

When travelling the Multiverse, always remember : Don't panic and always carry a towel.

[ariochiv]

You know you're in trouble when an astrophysicist calls you a nerd.

[MargoMB]

I've been staying home, dealing with depression, everything is just kinda 'meh' in my life... And then this. No idea why, but I got so excited while watching this video! I muttered to myself multiple times in an effort to actually understand things, 'rewound' (is that word even used anymore?) probably a half-dozen times to make sure I really took in what was being said... This made me so happy. I'll never truly *understand* most of these videos, but it's so so fun to watch and think about anyways.

[mlbatman]

Am I the only one that laughed uncontrollably at "this may all sound fun but unfortunately theres the inconvenient affect of your utter obliteration" @11:10

[ryanturner]

Can I get this Penrose diagram embossed on a towel? I'd like to pack as light as possible for the trip...

[dauntless]

*My Brain at the start of the video:*
“Multiverse _[Captivating Scientific Gibberish]_ . In English this is *[Captivating Scientific Gibberish with a hint of English]!* ”

[TheOnyxPath]

Well, this was an unexpected place to come across a Mage: The Ascension reference. Thanks, Matt!
We actually have a Kickstarter ending in about a week for a deluxe edition of our upcoming "Technocracy Reloaded, " so please do check that out if it's the sort of thing that interests you.

[thomasevans]

This is absolutely wildly interesting and elegant, I can conceptually comprehend maybe 19% of the whole concept at this time in this version of this existence in this universe.

[stevewithaq]

T-shirt idea (from 8:05) - "Naked Singularities are Repulsive"

[DFloyd]

"Repulsive naked singularity"? Way to give the singularity body image issues, Matt.

[manwithnoname]

“Let’s push a little harder and try to get through the ring”

[GamByr]

: Reads the headline: - yeah... I'll definitely understand this...