Sistema solare

JANET PETRO: Well, technically, space or outer space is a big void. It's a vacuum that exists beyond Earth. And even though space is a vacuum, it's not empty. Outer space contains...

BRAD: Now, some of our recent discoveries regarding the planets in our Solar System are thanks to Cassini. LIAM: Well, who's he then? BRAD: It's an unmanned spacecraft. LIAM: Well,...

Have you ever wondered how the earth stays in orbit around the sun? I mean, the pull of gravity is stronger the closer you are to the sun, so you'd think that if the earth got bumped slightly...