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QUESTION
Which of these is best described as being on the arm of a spiral? A. the moon within earth's orbit B.earth within the solar system C. the milky way galaxy within the universe D.the solar system within
Which of these is best described as being on the arm of a spiral?
A. the moon within earth's orbit
B.earth within the solar system
C. the milky way galaxy within the universe
D.the solar system within the milky way galaxy
