"Hubble's constant" is found to change with increase in time.Then why is it called a constant?
Answers:
Hubble's constant was believed to be constant when discovered. Although it can change with time it is still useful. Something that is a constant in a snapshot (of the universe?) need not be constant in a motion picture (Big Bang?) to help scientists understand the cosmos, right?
Hubble's constant doesn't change. That's why it's called a constant. What does change is our estimate of its actual value.
Have no idea what it is, but maybe when it was first sorted it was thought to be a constant.
Or it has a constant rate of change, or something like that.
I would find out what it is but I need sleep.
Kes has it right. The Hubble constant simply describes the rate of expansion at the current time.
Constant aren't; variable won't.
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