Multiple Choice
What two observations allow us to calculate the Galaxy's mass?
A) The Sun's mass and velocity in orbit of the Galactic center
B) The Sun's age and period of the Galactic Year
C) The Sun's orbital velocity and its distance from the Galactic center
D) The Sun's mass and its age
E) The Sun's composition and luminosity
Correct Answer:
Verified
Correct Answer:
Verified
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