Explain why Hubble’s parameter, with its value today called Hubble’s constant, is not actually a constant.

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Explain why Hubble’s parameter, with its value today called Hubble’s constant, is not actually a constant.

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Hubble's law states that the recessional velocity of the distant galaxy is directly proportional to their distance of the galaxy.

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Where H0 is the Hubble's constant and its present value is 70 km/s/Mpc. 

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