If there's one thing everybody knows about space, it's that there's no gravity once you leave the Earth's atmosphere. We all ...

Isaac Newton - isn't he the guy who discovered gravity? Great! So, what's gravity? Aaaah, gravity is the force that makes objects fall towards the ground. And, without gravity, we'd all float!

Gravity close gravityThe force of attraction between all objects. The more mass an object has, the larger the force of gravity it exerts. is a force that attracts objects towards each other. The ...