Multiple Choice
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
Correct Answer:
Verified
Correct Answer:
Verified
Q34: Briefly explain why stars that formed early
Q35: What evidence supports the theory that there
Q36: What makes up the interstellar medium?<br>A)open clusters<br>B)O
Q37: If you could watch a time-lapse movie
Q38: Which of the following statements about the
Q40: The Milky Way looks the same in
Q41: What kinds of objects lie in the
Q42: Suppose you discovered a star made purely
Q43: Sound waves in space<br>A)do not exist.<br>B)travel so
Q44: Suppose you read somewhere that 10 percent