How do the youngest, most distant galaxies compare with the older galaxies astronomers view nearby today?
A) The youngest galaxies are bluer and brighter than the older ones.
B) The youngest galaxies have the same color as the older ones but are significantly brighter.
C) There is no observable difference between the youngest galaxies and the older ones.
D) The youngest galaxies are redder and fainter than the older ones.

Question

Quizplus · Accepted Answer

The youngest galaxies are generally bluer and brighter than the older ones. This is because they have a higher rate of star formation, and young, massive stars are bright and emit more blue light.

How Do the Youngest, Most Distant Galaxies Compare with the Older