An astronomer discovers a new galaxy using a telescope. The astronomer wants to investigate how the galaxy is moving relative to the Milky Way galaxy. In one sentence, make a hypothesis about the movement of the galaxy and explain at least one way to test the hypothesis. pointel
Hypothesis: The new galaxy is moving away from the Milky Way galaxy.
Test: The astronomer can use the Doppler effect to measure the redshift of the light coming from the new galaxy, and if the observed light shows a redshift, then it indicates that the galaxy is moving away from the Milky Way galaxy.