Question

Why does gravity makes planets round shaped?

Answer 1

A sphere is the minimum average surface area for a solid volume. Natural processes tend towards the lowest energy state (entropy).

Explanation:

If you think of the gravitational force as a point source, even a collection of points will establish an effective “center of mass” or gravitation.

Thus, agglomerating particles will seek to minimize the energy potential between the bodies by forming spherical clumps rather than triangles or rectangles.