Is perception reality? Not when it comes to the Moon illusion. See the truth with your own eyes at the rising of the next full Moon.
S5 0716+71, a bright blazar currently in a feeding frenzy, invites you over for dinner the next clear night.
NASA's new remote observatory located on a windswept island in the mid-Atlantic provides a critical capability for tracking space junk.
Comet Catalina returns this month with naked-eye potential. Follow its every move with our guide and maps.
Travel 2.7 million light-years from home to the Pinwheel Galaxy, where we'll visit a supergiant star, an extragalactic globular cluster, and one of the largest nebulae in the known universe.
WT1190F will burn up over the Indian Ocean on November 13th, giving researchers an unprecedented opportunity to follow its path — and figure out where it came from.
Who says you need a telescope to see craters on the Moon? Here's how to find a half-dozen with just the naked eye.
An innovative Earth-observing satellite now shows near-daily views of our home planet online.
Open your bag wide as we go trick-or-treating in the "W" of Cassiopeia, home to more than 100 star clusters.
How and when to see the gegenschein, cousin of the zodiacal light and one of the greatest night sky naked-eye challenges.
Like people doing good imitations, novae often mimic planetary nebulae. Read on to learn how to watch the evolution of these tricksters using a common nebula filter.
AstroSat launched into orbit on September 28, 2015, and will soon start returning visible, ultraviolet, and X-ray images of the universe.
After a late-night ramble through the Hyades cluster, the waning gibbous Moon will cover up the bright star Aldebaran for observers across North America Friday morning.
Want to see a star rock in real time? Observe the Sun in the crimson light of hydrogen alpha and watch it come alive.
How much can you see of the Andromeda Galaxy system with just a pair of binoculars? Turns out a lot!
Some of the most stunning views of Sunday's partial solar eclipse didn't come from Earth.
Step by step, we explore the farthest things visible with the naked eye, from the most distant star to the hinterlands of the Andromeda Galaxy
Find out how two closely-orbiting stellar pairs create fireworks you can see in your own backyard telescope.
A collaboration of amateur and professional astronomers has uncovered a rare variety of eclipsing binary star - and a supernova in the making.
Neptune reaches opposition next week, giving amateurs the chance to track its unique, backwards-orbiting moon Triton.
Twilight. Gloaming. Dusk. Blue Hour — all names for that colorful and contemplative time between day and night. We explore twilight's brief but fascinating sights and learn why it gets shorter as summer turns to fall. Twilight takes us gently into that good night. I wouldn't mind spending time on the Moon, but I'd miss dusk and dawn. Many...
Quadcopters, the four-propellered drones that have become a familiar sight in terrestrial skies, may be the next big thing in space exploration.
Northern hemisphere observers have this month and next to get their best look at Rosetta's comet, 67P/Churyumov-Gerasimenko.
We pay a visit to Ceres, now the apple of the Dawn Mission's eye, as it creeps through Sagittarius this month
Students captured some amazing videos of near-Earth asteroids this past month, demonstrating a powerful tool for learning about some of our nearest celestial neighbors.