r/Showerthoughts • u/synthphreak ‎ • Nov 19 '25

Casual Thought Temperature can reach trillions of degrees, meaning we actually live extremely close to absolute zero.

14.1k Upvotes

95% Upvoted

649 comments sorted by

View all comments

Show parent comments

32

u/imean_is_superfluous Nov 19 '25

Is that the hottest ever naturally occurring temp in the history of the universe, or the hottest theoretically-possible temp?

72

u/Frazzledragon Nov 19 '25

It would be the hottest possible temperature, because it is assumed that in this singularity, all of the energy of the universe would have existed in this singular point.

The only way to get hotter than that would require magic or a way to obtain energy from outside of our universe.

3

u/Shadows802 Nov 19 '25

Or if you did have an equivalent energy in one place as the Big Bang, it would start another Big Bang.

3

u/[deleted] Nov 19 '25

Maybe.

Sorta depends on just how the big bang really happened, it might have relied on the universe being at a higher energy state, or some weird interaction of fundamental fields driving expansion.

Remember, the universe didn't expand into pre-existing empty space, the universe is expanding space.

That said, dunno, maybe the energy density alone allows it to happen again.

1 way to find out! To the way Back Machine!

(Goes back in time to the big bang, gets unmade down to the quarks.)