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

Brodie Moody

Physics

31 July, 11:06

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?

Kira Andrews · Answer 1

The galaxy is moving away from Earth.

Explanation:

Plato

Chloe · 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.