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 or two sentences, 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 due to the expansion of the universe.
Testing Method: Use the redshift of the galaxy's light to determine its radial velocity. If the galaxy's light is redshifted, indicating a longer wavelength, it suggests that the galaxy is moving away from us, supporting the hypothesis of an expanding universe.