eli5: Why is it temperatures can go up to the trillions but only down to -273?

Question

eli5: Why is it temperatures can go up to the trillions but only down to -273?

In: Physics

Answer 1

Cold isn’t equal to warmth. Warmth is the effect of moving molecules, whereas cold is the lack of movement. Similar to how there is no limit to how bright something can be, but dark is absolute because it’s just the absense of light, rather than its own thing. Cold is the absense of heat, and nothing else.