How many stars per cubic parsec are there in the spiral arms of a spiral galaxy compared with the regions between the spiral arms?
A) There are more than 100 times as many stars in the spiral arms as there are in the regions between the arms.
B) There are about twice as many stars in the spiral arms than in the regions between the arms.
C) There are a lot of stars in the spiral arms and none at all in the regions between the arms.
D) There are about 5% more stars in the spiral arms than in the regions between the arms.
Correct Answer:
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