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Define the Hubble constant as the ratio of the speed at which a galaxy is moving away from Earth to its distance from Earth, and recall the equation v = H₀d.

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Define the Hubble constant as the ratio of the speed at which a galaxy is moving away from Earth to its distance from Earth, and recall the equation v = H₀d

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You need to be able to define the Hubble constant as the ratio of the speed at which a galaxy is moving away from Earth to its distance from Earth, and recall the equation v = H₀d.
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Understanding the Hubble Constant

The Hubble constant relates the speed of galaxies to their distance from Earth. It is defined by the equation v = H₀d, where v is the velocity of a galaxy, H₀ is the Hubble constant, and d is the distance to the galaxy.

a
State the definition of the Hubble constant.
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Recognize that light from distant galaxies appears redshifted compared to light observed on Earth.
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Acknowledge that the redshift observed in light from distant galaxies indicates that the Universe is expanding, supporting the Big Bang Theory.
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