The Red Planet reaches the border of Cancer and Leo; tomorrow it will have crossed the line into the Lion, sharing it with ...

Our satellite passes several planets while Venus meets Spica in a close conjunction and spooky season culminates in the sky ...

This crescent-shaped cluster shines in northern Cassiopeia, visible all night long as the stars wheel around the North ...

October’s bright Full Moon offers an excellent observing target, allowing you to trace the rays thrown out by ancient impacts ...

The Moon passes 5° north of Uranus at 6 A.M. EDT this morning. You’ll find our satellite hanging above the Pleiades (M45) in ...

Even with a bright Moon in the sky, you can easily trace this “waterfall” of stars to its end in the spray of open cluster ...

This small martian satellite, the mission target for MMX, is destined to be shredded, changing the Red Planet forever.

A 1,100-mile-long ice cloud forms near the martian volcano Arsia Mons every morning. New simulations suggest it’s built by a ...

Saturn’s small moon Tethys makes another transit across the disk along with its shadow; several other moons are observable as ...

The Wild Duck Cluster is flying through the nighttime sky, a great object to check out during lengthening autumn evenings.

The Southern Fish is home to the bright luminary Fomalhaut, a lovely young star that shines brightly in the evening sky.

The Orionid meteor shower peaks this morning — the perfect time to watch for shooting stars, as Earth turns into the ...