Astronomers describe Mercury as an "inferior planet", because its orbital path around the sun is much closer than that of ...

Sky This Week is brought to you in part by Celestron. Friday, July 4Mercury reaches its greatest eastern elongation (26°) ...

Summer arrives for northern observers as the Moon visits Venus, Uranus, and Mercury. Plus: globular cluster M15, double star ...

The planet Mercury is visible after sunset in the west, forming a line with the heads of Gemini the Twins: the stars Castor ...

There’s truly nothing like a pretty sunset. As the sun sets, the heavens above are like cotton candy: lighting up with a beautiful display of deep reds, vibrant oranges, and intense pinks.

Have you ever looked up at the sky and wondered why it’s blue during the day, but glows orange or red during a sunset? It’s one of those everyday wonders we often take for granted. The answer ...

Antares is a red supergiant star located 400 light-years from Earth. The waxing gibbous moon will shine close to the red star Antares in the constellation Scorpius on the night of June 9.