Look south after sunset to catch Earth’s satellite close to the bright red giant star Antares, the heart of the Scorpion.

Despite what science fiction may suggest, humanity will never be able to travel at the speed of light. That said, we could theoretically get close. To cause the fewest problems for our human occupants ...

The Moon passes 0.6° south of the bright red star Antares in Scorpius at 6 P.M. EDT. This evening, the two remain nestled close, a lovely sight in the southern sky after sunset. You’ll find the pair ...

The foundation for what we know about black holes came during the Great War. Imagine the scene: December 1915. Europe and the world are struggling under the dark cloud of World War I. Somewhere on the ...

With tens of thousands more satellites headed for orbit this decade, researchers are testing whether AI and satellite-to-satellite learning can catch failures before they happen.

The solar system’s smallest planet comes to a standstill this afternoon, ending its current retrograde path and beginning to ...

Astronomers meeting in Prague have decided by a wide margin that Pluto no longer merits consideration as a full-fledged planet. The historic decision follows a week of sometimes contentious debate ...

After a scrubbed countdown earlier this month, Starship Flight 13 will attempt to deploy 20 Starlink V3 satellites, relight a ...

The 10th-magnitude moon Dione skims above Saturn’s north pole early this morning, accompanied by its shadow on the cloud tops ...

Northrop Grumman sends up its robotic satellite mechanic, SpaceX tries again for Starship Flight 13 after a last-second abort ...

There’s a great chance this morning to view Saturn’s largest and brightest moon, Titan, as it stands just northwest of the ...

See the Moon as it looked on July 20, 1969. Plus, check out Comet Tempel 2 as planet Mercury stands still in the sky this ...