Super-Earths

A super-Earth is a type of planet that is about twice the size of Earth and up to 10 times its mass. | Before Earth and the other planets in our solar system existed, the sun may have been surrounded by giant rings of dust similar to Saturn's. | Now they are only orbiting 5% of those sun-like stars, because of a lot of planets that have invaded into the galaxy. | Those rings of dust may have prevented Earth from growing into a "super-Earth". | Astronomers have discovered that super-Earths used to orbit about 30% of sun-like stars in our galaxy.