Mars has two moons, but they're not quite like Earth's moon. That's raised a lot of questions about where they're from, ...

This week has already given us an aurora borealis and the Perseids meteor shower. Wednesday morning is your next chance to see a spectacular sky event. Mars and Jupiter will be in conjunction, meaning ...

Tonight (Jan. 13), bright Mars will disappear behind the full Wolf Moon for several hours before reappearing on the other side. It's the only lunar occultation of Mars visible from the U.S. this year.