[deleted]
Comment on well?
procrastitron@lemmy.world 3 weeks ago
I took a physics course at a community college over 20 years ago and one of the things that stood out to me was the professor telling us not to overthink or assign too much romanticism to the idea of black holes.
His message was basically “it just means the escape velocity is greater than the speed of light… if you plug the size and mass of the universe into the escape velocity formula, the result you get back is greater than the speed of light, so our entire universe is a black hole.”
If this was being discussed at a community college decades ago then I think the new discoveries aren’t as revelatory as they would at first appear to the general public.
gandalf_der_12te@discuss.tchncs.de 3 weeks ago
squaresinger@lemmy.world 3 weeks ago
Journalist: What is context?
ivanafterall@lemmy.world 3 weeks ago
Context is text that served time in prison.
OrteilGenou@lemmy.world 3 weeks ago
It balances out protext, figure it out rookie
squaresinger@lemmy.world 3 weeks ago
Protext is what the really good journalists are writing.
SkaveRat@discuss.tchncs.de 3 weeks ago
another thing I learned at some point: Just because a physics formula returns a result, doesn’t mean that it’s reality
ChickenLadyLovesLife@lemmy.world 3 weeks ago
TBF black holes themselves were originally just the result of a Physics formula, but they eventually turned out to be a “reality”. Sometimes that shit happens, yo.
Cethin@lemmy.zip 3 weeks ago
Iff the rules of physics are accurate then it does, but we don’t know that they are. In fact, we’re pretty sure we’re missing some things. See: The Crisis in Cosmology.
dutchkimble@lemy.lol 3 weeks ago
Orr, you’re missing the obvious alternative here - the guy was a legendary level scientist, but the government stole his research and threatened his family and sidelined him into being a community college professor so that no one pays attention to his “drivel” so that they continue to control us into being workers for the capitalist pigs
pishadoot@sh.itjust.works 3 weeks ago
I mean, the model was first developed in the 70s so maybe not that specific guy
sudo_halt@lemmygrad.ml 3 weeks ago
Would make for a decent flick, get Hollywood on the call
TachyonTele@piefed.social 3 weeks ago
Theory is one thing.
Observation is the next step.procrastitron@lemmy.world 3 weeks ago
Absolutely. I don’t want to minimize the importance of the new discoveries in any way; I’m just saying this isn’t the great surprise the original post seems to think it is.
Olhonestjim@lemmy.world 3 weeks ago
Interestingly, galaxies at the edge of our ability to perceive are in fact receding away from us at velocities greater than the speed of light.
monkeyslikebananas2@lemmy.world 3 weeks ago
Maybe it’s because they are outside the black hole and aren’t time dilated.
Quadhammer@lemmy.world 3 weeks ago
Wouldn’t that mean if we can see them that light can enter/escape a black hole?
procrastitron@lemmy.world 3 weeks ago
Entering and escaping are two wildly different things.
It can enter, but not escape.
Ledivin@lemmy.world 3 weeks ago
Light can enter a black hole perfectly fine. We would be able to see things outside of it, because the light is still following us, but no light leaves the black hole, so you can’t see into it.
OrteilGenou@lemmy.world 3 weeks ago
When I first saw pictures of galaxies as a kid I noticed they all looked like black holes.
In a way we’re all just bits of organic matter mid-flush, waiting for the Drainpipe of Destiny
MintyFresh@lemmy.world 3 weeks ago
In a way we’re all just bits of organic matter mid-flush, waiting for the Drainpipe of Destiny
Word
scrubbles@poptalk.scrubbles.tech 3 weeks ago
Nah really it was probably some small thing the media got a hold of and just ran with. I think you’re spot on
Klear@lemmy.world 3 weeks ago
Relevant xkcd
And a relevant smbc for good measure.
msage@programming.dev 3 weeks ago
Your SMBC link doesn’t work for me, it just opens the index.
Klear@lemmy.world 3 weeks ago
Try now.
abbadon420@sh.itjust.works 3 weeks ago
Smbc is Saturday Morning Breakfast Cereal, but what does xkcd stand for?
DaPorkchop_@lemmy.ml 3 weeks ago
Xaturday Korning Creakfast Dereal
Klear@lemmy.world 3 weeks ago
It’s a random unique string, chosen to make the comic easily searchable.
prole@lemmy.blahaj.zone 3 weeks ago
Where’s PBF?
atomicbocks@sh.itjust.works 3 weeks ago
On the contrary; while I have heard the explanation that the commenter you replied to has said I have also heard a slightly different theory:
Our universe is the 3 dimensional event horizon of a 4th dimensional black hole. By extension we may find that black holes in our universe have similar funky 2 dimensional areas at their even horizons.
I am sure clickbait articles are part of it but there also seems to be several actual theories surrounding the idea of the nature of our universe relating to black holes.
beejboytyson@lemmy.world 3 weeks ago
Our universe is 4 d not 3 d
MotoAsh@lemmy.world 3 weeks ago
3+1, not 4D (we cannot move freely in time). They’re referencing the holographic universe theory, or holographic principle. PBS Spacetime has a good episode on the holographic universe theory.
vala@lemmy.world 3 weeks ago
Nah, this universe is 3d.
I’m assuming you are thinking that time is the 4th dimension and we have time here so we are 4d?
Time may be the 4th dimension, but in our universe, time doesn’t actually behave like a proper dimension. For one thing, dimensions should be spatially perpendicular to each other and time is not. We also seem to only be able to move one way through time whereas we can move back and forth through the other 3 dimensions.
Dimensions get weird and complicated. For the intents and purposes of this conversation it’s correct to say that the universe were experiencing now is 3 dimensional.
Cethin@lemmy.zip 3 weeks ago
Three spacial dimensions, which is normally what people mean when they say that, unless they specify otherwise. For example, we call them 3D game engines, not 4D. Yes, there’s also a time dimension that is special. It cannot be moved through freely.
PleaseLetMeOut@lemmy.dbzer0.com 3 weeks ago
Yes, but if you’re beyond the event horizon time becomes basically* irrelevant. You could literally turn around, look back out towards the rest of he universe, and watch all of time play out in the blink of an eye.
You know that scene in Interstellar where they land on the planet for 5 minutes, but 20 years passes for everyone else due to the planet’s mass? It’s the same thing, but a billion-billion-billion times more severe.
webghost0101@sopuli.xyz 3 weeks ago
Do you have any idea how little that narrows things down?