For any object moving uniformly, velocity = distance/time. If so, in the Hubble relationship for the expansion of the universe, V = H₀d, what is the significance of the constant 1/H₀? A) It is the inverse of the velocity that the object would have at a standard distance of 10 pc. B) It represents the average spacing between objects in the universe at the present time. C) It is merely a constant of proportionality, to allow for the different units of V and d. D) It represents the time since the expansion began, or the age of the universe, assuming the expansion has been uniform.

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Quizplus · Accepted Answer

The constant 1/H₀, also known as the Hubble time, represents the time since the expansion of the universe began, assuming it has been uniformly expanding. This means that the age of the universe can be estimated by taking the inverse of the Hubble constant.

For Any Object Moving Uniformly, Velocity = Distance/time