Quote:
Originally Posted by albania
No, I think you're right on the money. The density probably doesn't come much into it since the safe bet is that it can be approximated well enough by a uniform object. In fact for a sphere of uniform mass the force of gravity is simply determined by the distance from the center of the sphere and the mass of the sphere. The neat part is that this is true even when you're inside the sphere if you know how much mass is below you!
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I'm not big on astronomy so I'm probably wrong, but I thought a planet's gravity was determined by it's size in relation to the distance from it's parent star. Seeing as how the planet in question is closer to it's star than Earth is to the sun and is much more massive, I simply assumed the gravity on the planet was larger. I'm probably wrong, though.