Why Planets Are Round?

Planets are round because everything pulls together until it becomes a ball.

Imagine you have a big pile of clay. If you just leave it alone, it stays messy and lumpy. But if you shake it or push it from all sides, the clay will smooth out into a sphere, like a ball. That's what happens to planets, they're made of stuff that pulls together.

Planets are mostly made of rock and melted rock, which are heavy. When you have a big pile of heavy stuff, it wants to be close to the middle. This pulling is like when you squeeze a soft ball, everything moves toward the center until it becomes round.

Once a planet is round, it stays that way because all the pulling is even. There are no lumps or bumps sticking out anymore. It’s like when you roll out dough for cookies, if you press it evenly, it becomes flat and smooth. A planet is just like that big, heavy dough being pressed by gravity from all sides.