Why is there a small lower limit to temperaure (-273.15C) but almost limitless upperbound? (million of degree in a star for example)

Question

Is there even an upper limit to temperature?

In: Physics

Answer 1

Same reason why there is a lower limit to velocity. 0 speed.
It’s only called -273,15 because calling it 0 is less practical than using a water based reference (0 freeze, 100 boil).