In 1974,astronomers sent a message toward globular cluster M13.If life exists there,and it returns our signal,we won't receive it for at least another 48,000 years.Why not?
A) It will take that long for the space probe carrying our signal to reach the life forms there.
B) Based on the age of the stars in M13,we anticipate it would take that long for a civilization to evolve enough to interpret and respond to our signal.
C) M13 is far enough away that even light takes a very long time to reach it.
D) It will take that long before our Solar System and M13 are properly aligned again.

Question

Quizplus · Accepted Answer

M13 is located approximately 25,000 light-years away from Earth. Since the signal we sent in 1974 travels at the speed of light, it will take at least 25,000 years for it to even reach the cluster. Additionally, even once the signal reaches M13, it could take another 23,000 years for any potential life forms to receive, interpret, and respond to the message. Therefore, we wouldn't receive a response for at least 48,000 years.

In 1974,astronomers Sent a Message Toward Globular Cluster M13