Multiple Choice
Which of these phenomena is NOT produced by collisions between galaxies?
A) hot interstellar gas, detected by recent space-borne X-ray telescopes
B) concentration of galaxies into clusters and superclusters
C) distorted spiral arms in many galaxies
D) initiation of significant new star formation in so-called starburst galaxies
Correct Answer:

Verified
Correct Answer:
Verified
Q24: The expansion of the universe takes place<br>A)
Q25: Inside of galaxy clusters, which of these
Q26: What mechanism is believed to produce grand-design
Q27: At present, how far away are the
Q28: Which one of these statements about clusters
Q30: The Hubble law implies that distances are
Q31: A spiral galaxy is observed edge-on so
Q32: An astronomer studying a distant cluster of
Q33: An astronomer studying a distant cluster of
Q34: Hubble's law for distant galaxies, with H<sub>0</sub>