Humanity has built some incredibly destructive weapons. There are still roughly 12,000 nuclear warheads on Earth today, ...

This week, NASA announced it had shut down one of that spacecraft's remaining science instruments — not because the mission ...

The spacecraft was built at the Jet Propulsion Lab. And it has been operating ever since, almost without interruption, for ...

Gliese 581c is a planet that’s about 20 light-years away, hanging out in the constellation Libra. It circles its star pretty ...

Sky This Week is brought to you in part by Celestron. Friday, April 24Venus passes 0.8° due north of Uranus at 1 A.M. EDT.

A huge geological structure on Mars resembling a bathtub ring may be evidence of an ocean that once covered a third of the ...

Scientists studying the rings of Uranus have uncovered evidence that its outer rings contain both water ice and carbon-rich ...