Learn about gravity, stars, and really big lumps.
How do you know the sun didn't just explode? We aren't talking about the everyday, run-of-the-mill controlled explosion the sun is always doing, but a big boom.
Remember those inflatable clowns that stood about three feet high and had big red noses, meant for punching? Hit the clown as hard as you could, right back up.
No matter HOW fast the "fast" ball is moving, it will still fall at the same speed as the ball that just meanders over the edge.
Is the force of gravity increasing? Find out on this Moment of Science.
Pluto is too small to be considered a planet anymore, but our solar system appears to have a new ninth planet.
A black hole has such a powerful gravitational pull that it sucks up everything nearby, including light.
Astronauts cannot use conventional pens and pencils in outerspace. Here's why:
Clouds weigh several tons but stay airy by distributing their weight over a large area.
Saturn's rings are made of the remnants of former moons that were destroyed in a collision.