Why is the Milky Way Galaxy different from most spiral galaxies?
A) The Milky Way has only three spiral arms, whereas most spiral galaxies have at least four.
B) The Milky Way has only two spiral arms, whereas most galaxies have at least four.
C) The spiral arms of the Milky Way are far more tightly wound than those in most galaxies.
D) The Milky Way has at least four spiral arms, whereas most galaxies have only two.
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