Suppose that Star X and Star Y both have redshifts, but Star X has a larger redshift than Star Y. What can you conclude?
A)Star X is moving away from us and Star Y is moving toward us.
B)Star X is coming toward us faster than Star Y.
C)Star X is moving away from us faster than Star Y.
D)Star X is hotter than Star Y.
E)Star Y is moving away from us faster than Star X.

Question

Quizplus · Accepted Answer

According to Hubble's Law, the greater the distance between the observer and the celestial object, the greater will be the redshift observed. Therefore, since Star X has a larger redshift, it means that it is farther away from us and is moving away at a faster rate than Star Y. Thus, choice C is the correct conclusion.

Suppose That Star X and Star Y Both Have Redshifts