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.
I’m 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 due to the expansion of the universe.
Testing the hypothesis: The astronomer can measure the redshift in the spectrum of the galaxy's light, which will indicate the galaxy's movement away from us.
sorry i meant to type in not i’m.💀
Hypothesis: The new galaxy is moving towards the Milky Way due to gravitational interactions between the two galaxies.
Testing the hypothesis: The astronomer can measure the blue shift in the spectrum of the galaxy's light, which will indicate the galaxy's movement towards us.