this post was submitted on 19 Sep 2023
115 points (95.3% liked)

science

14061 readers
1206 users here now

just science related topics. please contribute

note: clickbait sources/headlines aren't liked generally. I've posted crap sources and later deleted or edit to improve after complaints. whoops, sry

Rule 1) Be kind.

lemmy.world rules: https://mastodon.world/about

I don't screen everything, lrn2scroll

founded 1 year ago
MODERATORS
all 46 comments
sorted by: hot top controversial new old
[–] [email protected] 53 points 11 months ago (1 children)
[–] [email protected] 26 points 11 months ago (1 children)

Anticompetitive strategies of other universes.

[–] [email protected] 23 points 11 months ago (2 children)

Late stage cosmos-capitalism is a bitch

[–] [email protected] 2 points 11 months ago

The MBAs have redefined Universal Sufferage

[–] [email protected] 1 points 11 months ago

Your username is hilarious! Made me exhale a little faster than usual. :)

[–] [email protected] 19 points 11 months ago (3 children)

The universe isn't small at all actually it's pretty average for its age some would say big even

[–] [email protected] 1 points 11 months ago

That's just so it doesn't feel bad.

[–] [email protected] 0 points 11 months ago

The universe was big enough for the dinosaurs ☹️

[–] [email protected] -1 points 11 months ago

That’s what she said?

[–] [email protected] 6 points 11 months ago (5 children)

At some point wouldn't gravity override the expansion and cause a contraction again?

[–] [email protected] 21 points 11 months ago (1 children)

Last I checked, the "Big Crunch" hypothesis got rejected by scientists.

I am no expert, so can't elaborate any further.

[–] [email protected] 6 points 11 months ago (1 children)

That's alright, I wasn't an expert when I asked the question. I was just curious about it.

[–] [email protected] 2 points 11 months ago

I am an expert. But not on this topic so I can't help y'all.

[–] [email protected] 11 points 11 months ago* (last edited 11 months ago)

The effects of gravity spread at the speed of light. If the sun suddenly blinked out of existence, it would take eight minutes to both see it disappear from Earth and notice a change in our planet's motion. In other words, the planet would continue to orbit that empty space in the middle because the sun's gravity, much like it's light, would still be extending out to us.

The universe is expanding in every part of space all at once. Some places are so far apart that the collective expansion between them is growing at greater distances in a given amount of time than light can travel. And the same can be said for the effects of gravity, but the motion of objects caused by gravity at great distances is far, far slower than the speed of light.

Our galaxy is moving in a direction that is caused partly by something called "The Great Attractor." But even though it's causing us to move, we will never reach it, and it's influence on us will gradually weaken. And it's not even that far away compared to most of what we know is out there.

That being said, this news is interesting.

[–] [email protected] 10 points 11 months ago

No, the expansion is accelerating.

[–] [email protected] 2 points 11 months ago (1 children)

If it was gravity causing it, it wouldn't be unusual.

[–] [email protected] 1 points 11 months ago

If the gravity is behaving as it is currently understood by the scientific community, it would indeed be unusual.

[–] [email protected] 2 points 11 months ago (2 children)

Heres a great source

It explains why the universe will have a cold death instead of a heat death.

Right now the universe is expanding and its expanding faster today than yesterday. Things could change, but current math points to a cold death

[–] [email protected] 18 points 11 months ago (2 children)

I always interpreted "heat death" as "the death of heat" instead of "a hot death"

[–] [email protected] 8 points 11 months ago

Your interpretation is correct.

[–] [email protected] 2 points 11 months ago (1 children)

You are correct and I misremembered it. "The Big Freeze" and "Heat Death" are the same thing. Thats when everything expands until there is no more heat.

If someone knows the correct terms for what I am talking about please let me know. Let me explain further.

What I am talking about is the opposite of heat death, which is somehow in my mind at a hot death? Basically, where everything goes back to one singularity instead of expanding forever.

[–] [email protected] 1 points 11 months ago

Big crunch is what I've heard it called but I don't know if that's what you're thinking of. Googling that might give you a start though.

[–] [email protected] 6 points 11 months ago* (last edited 11 months ago) (1 children)

That IS the heat death of the universe. It's not heat death as in "a wave of heat destroys everything" or anything like that, it's heat death as in "there is no more heat(aka condensed energy), everything is equally cold(aka lack of condensed energy) everywhere. Heat itself is gone, has died".

[–] [email protected] 1 points 11 months ago

That is correct and I misremembered. For some reason a heat death makes me think of going back to a singularity because a singularity would probably be the hottest thing ever. Ironically, a heat death would be really cold

[–] [email protected] 5 points 11 months ago

Its getting older, out of shape. Can't stretch like it used to. To many High Fructose Particles getting pinched in its gravity belt to move that fast.

[–] [email protected] 3 points 11 months ago

It's an old man with a beard and a scary need to be worshipped by nutters

[–] [email protected] 2 points 11 months ago (1 children)
[–] [email protected] 2 points 11 months ago (1 children)

Sorry guys, I've been a bit constipated lately.

[–] [email protected] 1 points 11 months ago

New explanation for the Big Bang?

[–] [email protected] 1 points 11 months ago

Must be The One Above All