a) A moon has been discovered around a planet of unknown mass. The moon orbits with P=98 days and a=440,000 km and the moon is thought to have a mass of $1.3 \times 10^{22}$ kg. What is the mass of the planet? You should give your answer in Mars masses.
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Mathematically, this can be expressed as: P^2 = k * a^3 where k is a constant. Show more…
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