When an astronomer sees certain stars and galaxies that look much redder than expected, what conclusion might the astronomer draw about the motion of that galaxy?

Question

Physics

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22 August, 04:37

When an astronomer sees certain stars and galaxies that look much redder than expected, what conclusion might the astronomer draw about the motion of that galaxy?

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Answers (2)

Know the Answer?

Ramon Valentine · Answer 1

The galaxy is moving away from Earth.

Explanation:

Plato

Genevieve Combs · Answer 2

It all comes to the doppler effect, the red shift means that the galaxy is moving away from us. The redshift is a result from the doppler effect, so as the galaxy moves away the wavelength expands, increasing the wavelength which responds to the red light.