Multiple Choice
Which parameter representing the motion of the material in the spiral arm of a galaxy is approximately constant and should lead to spiral structure in a galaxy?
A) linear velocity
B) inverse of the linear velocity
C) rotational period around the galactic center
D) product (velocity) ² × (distance to galactic center) , following a law equivalent to Kepler's third law for the planets
Correct Answer:
Verified
Correct Answer:
Verified
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