Hypothesis: The new galaxy is moving towards or away from the Milky Way galaxy due to gravitational forces between them.
Testing the hypothesis: The astronomer can use the Doppler effect to measure the galaxy's redshift or blueshift, which would indicate whether it is moving away (redshift) or towards (blueshift) the Milky Way galaxy.
an astronomer discovers a new galaxy using a telescope. the astronomer wants to investigate how the galaxy is moving relative to the milk way galaxy
in one or two sentences, make a hypothesis about the movement of the galaxy and explain at least one way to test the hypothesis
1 answer