Question

what are the rings around some planet​

Answer 1

One theory is that the rings formed at the same time as the planet and its major moons. In this case, if material is close to the planet, the planet's gravitational pull is too strong to coalesce into a moon and the particles that would otherwise form a moon spread out in orbit around the planet as a ring.

Answer 2

Answer:

The rings are dust small rocks or ice crystal, they are around saturn, Jupiter, Uranus like planets.

Some theories says that they are form by collision of other body.

Fun fact - Saturn can float on water it's density is less than water