Multiple Choice
How does the amount of dust and gas in a spiral galaxy vary with the classification of the galaxy?
A) The most loosely wound galaxy, Sc, has the most dust and gas in its arms.
B) All spiral galaxies Sa, Sb, and Sc types have about the same fraction of gas and dust within them, about 4% by mass.
C) Only the most tightly wound spiral galaxies, type Sa, have any dust or gas in them at all.
D) The most loosely wound galaxy, Sc, has the least dust and gas in its arms.
Correct Answer:
Verified
Correct Answer:
Verified
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