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The Andromeda Spiral Galaxy Is Almost Edge-On to Us

Question 92

Multiple Choice

The Andromeda spiral galaxy is almost edge-on to us. Astronomers have detected the orbital motion of this and other such galaxies' disk material by


A) using Hubble's law.
B) measuring Doppler shifts of different parts of the disk.
C) the steady state theory.
D) measuring Doppler shifts of different parts of the disk.

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