Earthed - How come the Earth is a sphere instead of a cube?

How come the Earth is a sphere instead of a cube?

And the same to other planets. What would happen if the Earth is cubic or a triangular prism?

Public Comments

The Earth isn't a sphere, it is an Oblate Sphereoid.
it will not be able to rotate correctly,maby??????????
Who told you that? Are you sure it's not a cube?

Actually, gravity accounts for the shape. It pulls with constant force toward the center. As the earth took shape as a forming planet, all pieces were pulled toward the center, naturally forming a sphere.
because gravity is pulling everything into one point which is the center of gravity
Well, in the universe, all objects want to attain minimum potential energy. So, when earth or other celestial bodies were hot and in liquid form, they took spherical form. After they congealed, the spherical form remained.

Earth is actually not exactly spherically. The equatorial diameter is more than the polar diameter. This is due to the centripetal force caused by earth's rotation
This is due to gravity pulling all parts of earth towards the same spot with the same gravitational pull
earth is sphere because every point on earth's surface is equidistant from center. we know that earth gravitational force is in its center. so it attracts objects towards it . so the object will try to go as much near center as it could. let us suppose there is a surface which has a curve in its center. now through a ball , it will go and will stay at the center. if a round magnet kept in the center of a paper full of iron fillings, the iron fillings will attach to it and will form a sphere because force applied is similar in all directions. like this , earth is also a sphere and not a cube.
That couldn't happen. When planets are forming and gravity pulls great clouds of interstellar dust together, it does so in the freedom of three-dimensional space. Particles attract each other from all sides, and these clouds eventually begin rotating. This rotation and the complex relationship of gravitating particles in the cloud "rounds off" any would-be corners from a planet, resulting in the spherical (or, to be more precise, in Earth's case, an oblate spheroid) shape with which we are familiar. It's no accident; it's physics!
because we havent been assimilated by the borg yet ;)
gravitational pull is even so there are never going to be corners
As for the "what if" question, an earth-bound observer would feel no astounding difference between a spheroidal earth and a cuboidal or tetrahedral earth. Gravity is gravity, it will always act on an object by pulling it towards the center of another body. The only problem with, say, a cubic earth, is at the edges, which will appear as a mountain range.
Just like a droplet of water in space.... it forms into a rounded structure because the gravity ( electro-attraction on the sub-atomic level ) of the object is resisting a uniform but opposite force from the surrounding vacumn of space. Bigger the planet

( not gas gaints ) more gravity.