A small world 4.5 times Earth's mass is circling its star in the wrong direction. Normally there's a bully nearby to blame.

Astronomers have discovered a faint population of young stars extending far beyond the known edge of the nearby spiral galaxy Messier 74. The finding suggests the galaxy is nearly twice as large as ...

A space rock struck the Moon in 2024, carving a 728-foot crater. Two new studies show how the impact reshaped the lunar ...

The Chandra X-ray Observatory (Chandra) and the X-ray Multi-Mirror Mission (XMM-Newton) continue to expand the frontiers of knowledge about high-energy processes in the Universe. These groundbreaking ...

For more than 30 years, astronomers have been searching for a particular kind of black hole. They knew it should exist somewhere in our galaxy, but they just couldn’t find one. Now, they’ve finally ...

The search for favorable astrophotography conditions has only gotten harder due to changing atmospheric conditions, ash and ...

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

Astronomers confirmed the planet by reanalyzing archival infrared data from the W. M. Keck Observatory and combining it with images from the Very Large Telescope and the ALMA radio array. The finding ...

A Space Telescope Science Institute astronomer will hold three free presentations Oct. 1-3 for students, the general public, and educators.

Binary systems are common, and it is assumed that they mostly form together. Now two have been discovered that have only just found each other.

As the full Moon sets, the Sun is about to rise on the opposite horizon. The Very Large Telescope (VLT) has already closed its eyes after a long night of observations. The extraordinary quality of ...