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 due to the expansion of the universe.
To test this hypothesis, the astronomer can measure the galaxy's redshift using spectroscopy, and if the galaxy shows a redshift, it would indicate that the galaxy is moving away from the Milky Way.
can u simplify it like what a student might write?
Hypothesis: The new galaxy is moving away from our Milky Way galaxy because the universe is expanding.
To check if this is true, the astronomer can use a special tool called spectroscopy to measure the color of light coming from the galaxy. If the light appears more reddish, it means the galaxy is moving away from us, supporting the hypothesis.