What do we mean by a protogalactic cloud?
A)a cloud of hydrogen and helium that contracts to become a galaxy
B)a term once used historically to refer to any galaxy
C)the cloud-like halo that surrounds the disks of spiral galaxies
D)a cloud of gas that was once a galaxy

Question

Quizplus · Accepted Answer

A protogalactic cloud refers to a cloud of hydrogen and helium that contracts under the force of gravity to eventually form a galaxy.

What Do We Mean by a Protogalactic Cloud