this post was submitted on 10 Feb 2026
762 points (98.0% liked)

Curated Tumblr

7101 readers
3 users here now

For preserving the least toxic and most culturally relevant Tumblr heritage posts.

Here are some OCR tools to assist you in transcribing posts:

Don't be mean. I promise to do my best to judge that fairly.

founded 2 years ago
MODERATORS
 
you are viewing a single comment's thread
view the rest of the comments
[–] tomiant@piefed.social 13 points 2 months ago (4 children)

Space has no temperature. Space is a vacuum. Temperature needs things to jiggle.

[–] salvaria@lemmy.blahaj.zone 11 points 2 months ago (3 children)

The average temperature of the universe today is approximately 2.73 K (−270.42 °C; −454.76 °F), based on measurements of cosmic microwave background radiation.

https://en.wikipedia.org/wiki/Absolute_zero

Cited from https://www.abc.net.au/science/articles/2003/09/25/947116.htm

[–] AeonFelis@lemmy.world 5 points 2 months ago (2 children)

Wonder how they calculated the "average" temperature. Was it weighted by mass or by volume?

[–] Feathercrown@lemmy.world 3 points 2 months ago (1 children)

Only mass-weighting really makes sense here imo

[–] Einskjaldi@lemmy.world 2 points 2 months ago (1 children)

Wouldn't that be just star and not star?

[–] AeonFelis@lemmy.world 1 points 2 months ago (1 children)

No - it'd mostly be dark matter vs not dark matter.

[–] Feathercrown@lemmy.world 1 points 2 months ago* (last edited 2 months ago) (1 children)

I'm still on the "dark matter isn't real" train. It would be so unsatisfying if it was the answer.

[–] AeonFelis@lemmy.world 2 points 2 months ago

Dark mind is definitely real though

[–] vin@lemmynsfw.com 1 points 2 months ago

Doesn't matter, it's just the eventual temperature of a black body kept in deep space

[–] flying_sheep@lemmy.ml 3 points 2 months ago

That's purely academic. IRL what actually matters is “how big and reflective is the thing you're in”.

You'd get real hot real fast in a matte black space suit.

[–] tomiant@piefed.social 1 points 2 months ago

Well yes, because space is not actually a complete vacuum.

[–] essell@lemmy.world 5 points 2 months ago

But a thing in space is not a vacuum and is subject to heating via solar radiation

[–] MonkderVierte@lemmy.zip 3 points 2 months ago

And actually, space only gets cold (more surface radiation cooling than solar heating) a bit after Mars orbit. On earth orbit, it's already a bit crisp toasty.

[–] Kolanaki@pawb.social 1 points 2 months ago* (last edited 2 months ago) (1 children)

Yeah, that's kinda why it's cold. Cold is just an absense of heat.

[–] Feathercrown@lemmy.world 2 points 2 months ago

Cold is the absence of heat in a medium that can interact with temperature imo. It certainly wouldn't act like normal cold; if you stuck your hand out and felt the vaccuum, it wouldn't feel cold, and the heat in your hand would not flow outwards into space very much. There's no convection, only radiation. Space isn't cold, matter is cold, and there's no matter.