The Moon orbits the Earth the Earth orbits the Sun. If the Earth-moon system is ˜1 AU from the Sun and takes ˜1 Earth year to orbit, what is the combined mass of the triple system? Express your answer in solar mass units.

a. 1
b. 1.1
c. 1.2
d. 1.3


Answer: a. 1

Physics & Space Science

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