Ask your own question, for FREE!
Chemistry 8 Online
OpenStudy (anonymous):

How can astronomers tell what a distant object's velocity is? by looking for particular lines in its spectrum by measuring the redshift or blueshift of the object by timing how long it takes light to reach the object and return by the frequency of the electromagnetic radiation it gives off

Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!
Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!