Scientists once thought luminiferous ether pervaded the cosmos. Michelson and Morley’s ingenious experiment to find it ...

Distant planet Neptune passes close to a golden-hued background star this evening, offering a nice color contrast.

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

The strange lunar swirl Reiner Gamma marks a starting point to explore several craters visible near the lunar terminator ...

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

In a groundbreaking announcement, the U.S. Space Force stated publicly on Monday, Sept. 14, that it currently has on-orbit ...

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

Discover how star clusters influence galaxy evolution and planet formation, revealed by JWST in a groundbreaking study.

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

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

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.

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