Multiple Choice
Dust in galaxies does not count as dark matter because
A) it absorbs only some wavelengths of light but not all wavelengths as dark matter does.
B) it interacts with light.
C) it is found only in spiral disks, whereas dark matter is also found in elliptical galaxies.
D) dust is easily destroyed by dark matter.
E) there is never enough to account for all the gravity in galaxies.
Correct Answer:
Verified
Correct Answer:
Verified
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