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

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

In the post-sunset sky, look west to find the two standing close together, with Mars just to the upper right of Regulus. Both star and planet are the same magnitude (1.4) but their colors will ...

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.