A planet is a large, mostly round, object that travels around a star. Our planet, Earth, is one of eight planets that travel around our Sun. Each planet is very different. Let's meet the planets in our Solar System and find out what each one is like.
A planet is a large, mostly round, object that travels around a stars. Our planet, Earth, is one of eight planets that travel around our Sun. Each planet is very different. Let's meet the planets in our Solar System and find out what each one is like.