By 2016 astronomers were able to observe galaxies about 13.4 billion light-years away. Thus, they were observing these galaxies
A) almost immediately after the Big Bang.
B) a few billion years after the beginning of the universe.
C) at about half their present age.
D) at about 90% of their present age.

Question

Quizplus · Accepted Answer

The correct answer is B because the light from these galaxies has been traveling for 13.4 billion years, which means that the galaxies were emitting this light 13.4 billion years ago, a few billion years after the beginning of the universe.

By 2016 Astronomers Were Able to Observe Galaxies About 13