For any object moving uniformly, velocity = distance/time. So in the Hubble relationship for the expansion of the universe, v = H₀r, what is the significance of the constant 1/H₀? A) This quantity represents the average spacing between objects in the universe at the present time. B) This quantity represents the time since the expansion began, or the age of the universe. C) This quantity is merely a constant of proportionality to allow for the different units in v and r. D) This quantity is the inverse of the velocity that the object would have at a standard distance of 10 parsecs.

Question

Quizplus · Accepted Answer

This quantity, 1/H, where H is the Hubble constant, is significant because it represents the time since the expansion of the universe began, effectively giving an estimate of the age of the universe.

For Any Object Moving Uniformly, Velocity = Distance/time