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.
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.
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.
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.
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!
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.
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...
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
Like "catching some rays"? This weekend's Blue Moon invites us to explore the beauty and dazzle of crater rays, the tracks left by powerful impacts in the not-so-distant past.
In search of a pitch black night? Don't expect to find it on Earth. Thanks to starlight, zodiacal light, and especially airglow, true darkness doesn't exist.
One of the smallest constellations in the sky hosts one of the richest concentrations of dark nebulae. Join me for a dip in these dark pools from which the next generation of stars will be born.
Comet C/2014 Q1 PanSTARRS has been skirting the northern horizon since mid-June. Now it's ready to dip Down Under, where it may be visible with the naked eye in evening twilight.
July nights bring the green flicker of fireflies and a question — are there any green stars we can see in our telescopes? The answer may surprise you.
It's no myth. Icarus makes a rare flyby of Earth this week. Here's how to see it in your telescope and live online.
Cobwebs of cosmic dust limit how far we can see into the Milky Way's hub, but Baade's Window offers a rare glimpse into the stellar riches that await us there.
Stars may appear static, but they're on the move. Put these two speed demons on your observing list this summer. When you return in a year or two, you'll be pleasantly surprised.