Question

Why doesn't earth has a ring around it just like saturn,jupiter etc.

Answer 1

according to me those rings are called orbit where revolution and rotation happens
my answer might be wrong also.It was just my guess......

Answer 2

Our luck has been a lot different than Saturn. It rings consists of billions of particles. Scientists aren’t exactly sure how they got there, but many of them, probably, came from asteroids, comets and other space rocks that got captured by the planet’s gravity, eventually they got torn apart in smaller fragments. But, Earth’s got a moon and it hasn’t broken up into rings. There’s a good reason for that and it has to do with something called the Roche Limit.

An object like a moon will orbit the planet if it’s captured by the planet’s gravity, but once its captured, it doesn’t just sit back and go along for the ride, instead, gravitation is constantly trying to tear it apart with tidal forces. These forces come from the fact that gravity isn’t uniform. The closer you are to the center of the planet, the stronger it gets. So, the side of the Moon that’s facing the planet feels a stronger pull than the far side.