usrnm parent
It's not like using Kelvin or Celsius helps you grasp these temperatures. -173C is very, very cold, but how cold? What can you compare it to? Not many humans have any experience with something of this scale
Liquid nitrogen (boiling at -196 C) is a semi-common substance that people would have heard of, though not everyone would have seen or interacted with it.
I've seen liquid nitrogen, briefly, as it was sprayed out of a hose. It immediately boiled into a (quite cold) gas, of course. I was told not to play with it too much because they would have to evacuate the building. Oh the joys of "bring your kid to work" days in manufacturing facilities
Fair, but in Celsius or Kelvin I know how close it is to absolute zero. In Fahrenheit I have no idea!
You compare to 0 kelvin, you know where it's on the Celsius scale, not on F