Multiple Choice
A spiral galaxy is observed edge-on so that the spiral arms cannot be seen clearly.Is it possible to classify this galaxy using the Hubble classification scheme?
A) Yes. The classification scheme is also an evolutionary scheme. It is possible to classify galaxies by age, for example, by counting the number of blue supergiants visible along the edge.
B) Yes. The tightness of spiral arms is correlated with the size of the nuclear bulge.
C) Yes. The tightness of spiral arms is correlated with the number of bright H II regions that can be counted along the edge.
D) No. The classification scheme is based upon the tightness of spiral arms. If the arms cannot be seen, the galaxy cannot be classified.
Correct Answer:
Verified
Correct Answer:
Verified
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