Question

what is hubble's constant​

Answer 1

Answer:

Hubble's constant, in cosmology, constant of proportionality in the relation between the velocities of remote galaxies and their distances. It expresses the rate at which the universe is expanding. According to this law, known as the Hubble law, the greater the distance of a galaxy, the faster it recedes.

Answer 2

the ratio of the speed of recession of a galaxy (due to the expansion of the universe) to its distance from the observer. The reciprocal of the constant is called Hubble time and represents(u pagal) the length of time for which the universe has been expanding, and hence the age of the universe.