What Is Kepler's Law Determine The Volume Of A Planet Interesting?

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Average density in general is determined using the formula mass divided by volume. Therefore, the two properties needed to determine the density of a planet are the its mass and volume. What makes finding the average density of a planet interesting is the way astronomers have to go about finding the planet's mass and volume, as you cannot simply place a planet on a scale. In order to determine the mass of a planet, Kepler's Law is used. By determining the period of its moons' orbits, they are able to determine the planet's mass. (As a side note, Venus and Mercury have no moons so their masses are determined by measuring their influence on other planets and deflection of comets that pass near them. As this is not 100% accurate, spacecrafts have

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