Here's how to see 5 planet alignment this weekend

There's another chance to see five planets lined up in the sky. Saturn, Neptune, Jupiter, Uranus and Mercury will appear together before sunrise on Saturday, weather permitting.

Are black holes a danger to us?

The amount of mass a black hole can contain is likened to a star 10 times more massive than our sun squeezed into a sphere about as wide as New York City, according to NASA.