Planetary Size and Smoothness
Date: March 13, 2004
Hypothetically, if there were two planets of the same composition and one had
a significantly larger mas than the other, would that planet also be significantly
smoother because of its gravity?
Gravity is but one of the forces operating on the surface of a planet. In fact it is the
weakest force. So it would depend upon many more variables -- vulcanism, plate tectonic
movement (if operative), erosion, distribution of the mass (which is not uniform), and
so on. It would be difficult to predict one way or the other, I would think.
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Update: June 2012