Determining Planet Properties

Clicking on the planet's name will bring up the full fact sheet for that planet. The important properties are given in the table. Formulae. Planet mass = (4 2/G) × [distance3/(moon's orbital period)2] - moon's mass. The moon's mass can usually be ignored. Planet diameter = 2 × (distance to the planet) × (planet's angular size in degrees)/360°. ................
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