You can be part of ongoing professional stellar research through the American Association of Variable Star Observers. Here's ...

A possible Jupiter-sized object circling the brown dwarf CD-35 2722 b has implications for planetary science, including what ...

The Sun passes the celestial equator moving south today, marking the Northern Hemisphere’s transition to autumn.

Here's what's launching Sept. 21–27: two Chinese rockets go up, Rocket Lab delivers an Earth-observation satellite, and ...

Our current planet-hunting techniques are unable to detect an Earth-like planet in an Earth-like orbit around a Sun-like star.

Rising around 7:30 P.M. local daylight time, Saturn reaches an altitude above 40° in the southeast by local midnight. Visible ...

Now is the best time to catch 145-mile-wide 3 Juno as it passes through a random collection of 9th- and 10th-magnitude stars.

Mars passed 6° due south of Pollux in Gemini at midnight on the 18th, and they now rise together in the early-morning sky. An hour before sunrise, the heads of Gemini have reached an altitude of ...

HST celebrated its 36th birthday in space with a detailed look at the famous Trifid Nebula (M20), a dusty stellar nursery.

The young, bright open cluster NGC 7243 rides high in the sky late tonight, located in the zig-zagging constellation Lacerta.

As the seasons change, Venus shines bright, Neptune contrasts in color with a nearby star, and Mercury passes Spica in the sky this week.