What does redshift imply?

1 Answer
Callum S.
Dec 2, 2015

Redshift implies that the galaxy is moving away from us.

Explanation:

When an observed galaxy is moving away from Earth, the light radiating from the galaxy increases in wavelength, which implies that the galaxy is moving away, as the distance between the galaxy and Earth is getting larger.

Blueshift, in contrast, implies that the observed galaxy is moving towards Earth, as the wavelength of the light radiating from the galaxy is decreasing in wavelength.

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