Hypatia set the stage for the women scientists who followed her, but at a great price.

Pluto was recently demoted -- will its moon Charon be reclassified as well?

Happy Astronomy Day!

The annual eta Aquarids meteor shower peaks this week.

Icy and rugged, Rhea is Saturn´s largest airless satellite. And now, it may be the first moon to have been discovered to have rings.

NASA´s latest mission reveals a new look at the planet Mercury.

This year, the Leonid meteor shower peaks Nov. 18.

This week, Mars will act a little strangely.

Halloween´s origins date back to the Celtic solar calendar.

The Orionid meteor shower peaks Sunday morning--and may offer up one of its most brilliant shows in decades