When a celestial body, such as a moon, planet or an asteroid passes in front of another celestial body, blocking its view, we call that an occultation. The word is derived from the Latin occultäre, to ...

Although many lunar phenomena are one-night-only events, a ring around the moon is much less elusive. Also known as a lunar halo, a bright white ring of light around the moon can appear anytime ...

The night sky tonight and on any clear night offers an ever-changing display of fascinating objects you can see, from stars and constellations to bright planets, the moon, and sometimes special ...