Mercury currently appears as a bright "evening star" in the southwestern sky at sunset. Mercury will reach its greatest ...

Last Quarter Moon occurs at 8:28 P.M. EST, leaving most of the evening dark for deep-sky observing. About two hours after sunset, you’ll find the Great Square of Pegasus high in the southeastern sky.

The Secret Behind Light's Journey Through Space Visible light travels in electromagnetic waves, which we see as the colors of ...

The sky tells us a lot about what’s going to happen in weather. Last night’s sunset had a few strong hints as the chaotic sky developed. Sorry, I’m going to ...

Mars will pass 0.8° north of Regulus at midnight EDT, and both are visible for several hours after sunset for evening observers to enjoy. In the post-sunset sky, look west to find the two standing ...

Looking for a sky event this week? Check out our full Sky This Week column. October 31: Peer into the Ghost's Goblet Tonight ...

Nov. 6: The full beaver supermoon is at 11:47 p.m. Eastern Time and rises at sunset in the East. This is the first full supermoon of 2025 and the largest and brightest full moon of 2025. Should be a ...

The sky is filled with rare celestial treats this week. Want to spot some cool comets? Here's what to know about comets ...