The light that arrives at Earth from the Coma cluster of galaxies has traveled for approximately how long?
A) 300 billion years
B) 300 million years
C) 92 million years
D) 30 million years

Question

Quizplus · Accepted Answer

The light from the Coma cluster of galaxies has traveled for approximately 300 million years to reach Earth. This is because the Coma cluster is about 300 million light-years away from us, meaning light takes that long to travel from there to here.

The Light That Arrives at Earth from the Coma Cluster