Question

What is Hubble's Constant and how was it found?

Answer 1

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$\bf Hubble \: Constant$ is 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 the length of time for which the universe has been expanding, and hence the age of the universe.

One of the most important formulas of the 20th century. It shows the expansion of the Universe by showing how distant galaxies are moving away from us. Formula: v = Ho d where: v = velocity of a galaxy, in km/s. Ho = Hubble Constant, measured in km/s/Mpc.

Answer 2

It is 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 the length of time for which the universe has been expanding, and hence the age of the universe.

One of the most important formulas of the 20th century. It shows the expansion of the Universe by showing how distant galaxies are moving away from us. Formula: v = Ho d where: v = velocity of a galaxy, in km/s. Ho = Hubble Constant, measured in km/s/Mpc.