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.

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

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

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

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

Europe's Vega C lifts a pair of Earth-observation satellites from French Guiana, China targets five launches, and Russia ...

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