A spiral galaxy is observed edge-on so that the spiral arms cannot be seen clearly. Is it possible to classify this into one of the Sa, Sb, and Sc categories?
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 on the tightness of spiral arms. If the arms cannot be seen, the galaxy cannot be classified.
Correct Answer:
Verified
Q1: A spiral galaxy is observed edge-on so
Q2: What is the classification for a spiral
Q4: According to the Hubble classification scheme, an
Q5: In a spiral galaxy, the
A) spiral arm
Q6: In spiral galaxies, the tightness of the
Q7: What is the classification for a spiral
Q8: An astronomer studying a distant cluster of
Q9: A particular galaxy appears round, with a
Q10: What is the basic shape of a
Q11: According to the Hubble classification scheme, an
Unlock this Answer For Free Now!
View this answer and more for free by performing one of the following actions
Scan the QR code to install the App and get 2 free unlocks
Unlock quizzes for free by uploading documents