What caused the planets and the Sun to have spherical shapes? Type here to search A force of inertia that pulls matter in a planet or star away from the center equally in all directions A gravitational force that pulls matter in a planet or star away from the center equally in all directions A force of inertia that pulls matter in a planet or star toward the center equally in all directions A gravitational force that pulls matter in a planet or star toward the center equally in all directions
A planet's gravity pulls equally from all sides. Gravity pulls from the center to the edges like the spokes of a bicycle wheel. This makes the overall shape of a planet a sphere, which is a three-dimensional circle.
