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Tsync Tsync
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8 years ago
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 composition and luminosity
C) the Sun's orbital velocity and its distance from the Galactic Center
D) the Sun's age and period of the Galactic Year
E) the Sun's mass and its age
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Astronomy Today

Astronomy Today


Edition: 8th
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Minoring in physics
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RatatouilleRatatouille
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8 years ago
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Tsync Author
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8 years ago
Wonderful, thanks for your time and effort
Minoring in physics
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8 years ago
Happy to help Slight Smile
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