How come all the planets in our solar system are round?

Answer 1

I'm no scientist and don't profess to know the answer, but isn't it because of the spinning and gravity?

Answer 2

There became 9 until eventually about a mont or 2 in the past even as scientists determined that Pluto became too small to be seen a planet. So we've 8 planets in our image voltaic equipment.

Answer 3

The gravity of the planet smooths any corners or bulges, once it gets beyond a certain size. It's called Hydrostatic equilibrium. (BTW none of the planets are perfect spheres, their rotation makes them bulge at the equator.)

Answer 4

That's how planet formation works, most dense at the center, gradually decreasing (works out to create a sphere), of course they're not perfect circles but the overall shapes are the same.

Answer 5

When a object becomes massive enought it's gravity overcomes ridiged body forces and pulles it's self into a ball. This state is called "Hydrostatic Equilibrium"

http://tech.groups.yahoo.com/group/NeatAstronomy/

Answer 6

Gravity pulls them into a sphere and rotation flattens them slightly and makes them bulge at the equator.

Answer 7

Because of gravity, its as simple as that.