Looking for a sky event this week? Check out our full Sky This Week column. October 10: Spot Ceres in Cetus Last week, Io and Europa took a trip together across Jupiter, transiting the planet with ...

On some, whipping winds send a rain of glass flying sideways; others have a core of carbon compressed into diamond. Take a ...

Rogue planets, also called free-floating planetary-mass objects, typically have a mass a few times greater than Jupiter, ...

Two newly discovered comets are streaking across the sky in a spectacular display as they make their closest approaches to ...

The case for a newborn ocean on Saturn's moon Mimas continues to build.

When Earth is opposite Mars from the sun, it will appear full because you’re looking directly on the daylit side. But ...

Comet SWAN will be visible only in early evenings after sunset, while Lemmon can be seen just before sunrise. However, both ...