Well, since the universe is expanding it is probably moving away.
We know what frequency light we should see from every radiating atom in that system if it were not moving toward or away. If we see a higher frequency it is moving toward us/ If lower, then away ;Just like a train whistle as it passes you (beep ---> boop) ) {google doppler effect}
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.
3 answers
idk lol
Anonymous is right
3 answers