Planetary alignments aren't rare, but they can be when they involve six of the eight planets in our solar system.

For a few months, Earth had a second moon — a tiny asteroid that may have been a piece of our own Moon ...

What if Earth had rings like Saturn? This fascinating thought experiment explores how massive planetary rings would change our sky, environment, and even daily life. From altered weather patterns to ...

The Moon passes 0.3° south of the bright red giant star Antares at 7 P.M. EST. However, the pair isn't visible this evening, as they'll rise in the early-morning sky, so we'll feature them tomorrow.