Redshift measurements of the visible afterglow of a gamma-ray burst show that these objectsare:
A)in the solar neighborhood.
B)in the Milky Way Galaxy.
C)in the Local Group.
D)billions of light-years away.
E)at the most extreme observable distances.

Question

Quizplus · Accepted Answer

Redshift measurements indicate that gamma-ray bursts are billions of light-years away, making them among the most distant and energetic phenomena in the universe. Redshift measurements of the visible afterglow of a gamma-ray burst indicate that these objects are billions of light-years away, at some of the most extreme observable distances in the universe.

Redshift Measurements of the Visible Afterglow of a Gamma-Ray Burst