Twisted Sifter on MSN7mon
The Moon Is Slowly Drifting Away, But Could It Ever Escape Earth Entirely?
At least, not as far as they know. The Moon was created 4.5 billion years ago, probably when Earth collided with a planet ...
The Conversation on MSN13d
Curious Kids: Why does a rocket have to go 25,000 mph to escape Earth?
Bigger, or more massive, objects have stronger gravitational pull. A rocket launching from a planet bigger than Earth would need to achieve a higher escape speed. For example, Jupiter is the most ...