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 ...

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

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

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.

Dark-sky sights take center stage as Saturn's moons dance and Venus mingles with the Moon in the sky this week.

High in the eastern sky this evening you’ll find the zig-zagging constellation Lacerta, home to several lovely and relatively bright open star clusters. Tonight, let’s check out the brightest of those ...

Air Force Secretary Troy Meink's announcement is the first official U.S. acknowledgment of space-based weapons.

The Red Planet stands a few degrees south of the bright star Pollux in Gemini, easily visible in the early-morning sky.

Dione crosses Saturn’s north pole, projecting its shadow onto the cloud tops as Tethys disappears into the planet’s shadow.