Look for the Great Square of Pegasus in the east late this evening, bounded by four stars — including one in a neighboring ...

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 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 ...

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 ...

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

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 ...

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

The FCC approved a demonstration satellite designed to beam sunlight to Earth at night, ruling that the light pollution, ...

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

Tonight, the waxing crescent Moon will look just as it did on the night of July 20, 1969, when humans first set foot on our ...

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 ...

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