Use the scenario to answer the question. 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.
Hypothesis: The new galaxy is moving away from the Milky Way galaxy, indicating an expansion of the universe.
Testing the hypothesis: One way to test the hypothesis is by analyzing the galaxy's redshift using spectroscopy. If the galaxy's light is being shifted towards longer wavelengths, it would suggest that it is indeed moving away from us, supporting the hypothesis.