A black hole has such a powerful gravitational pull that it sucks up everything nearby, including light.
In 2007, a Dutch schoolteacher discovered green ghostly structures surrounding distant galaxies that he dubbed "voorwerps."
So what's all this hype about "string theory"? Find out what scientists are saying about it now!
The neatest new idea for a telescope is a deep hole in the pole. Learn about the AMANDA II on this Moment of Science.
What's the lowest note in the universe? The answer may surprise you. Find out on this Moment of Science.