[rarestia]

Absolute zero is theoretical insomuch as they’ve never seen true 0K. Places in space get below 1K but only fractionally (e.g. 0.05K).

Absolute zero is the point where matter ceases to “vibrate,” as I understand it. Not sure that’s actually measurable.

[sportutegrl]

Absolute zero is the point where matter ceases to “vibrate,” as I understand it. Not sure that’s actually measurable.

My thermometer goes down to -4 Kelvin.

[Abathar]

It’s not measurable I didn’t think, from what I understand at absolute zero doesn’t the electrons just collapse in on nucleus?

[Moonman62]

Absolute zero is theoretical insomuch as they’ve never seen true 0K. Places in space get below 1K but only fractionally (e.g. 0.05K).

...

I’m curious as to where that would be since the temperature leftover from the Big Bang is around 3 degrees K.

[Moonman62]

The coldest known natural temperature at one degree K.

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