Astronomers using the ALMA array of radio dishes have detected a dwarf galaxy 4 billion light-years away by the pull of its dark matter.
Our state-of-the-art representation of the entire celestial sphere lets you explore the stars above as never before.
Planetary scientists have increasing reasons to think that some of the ringed giant’s moons are only 100 million years old.
If you've never seen the fleet-footed planet Mercury, now is a great time to look for it in the evening sky after sunset.
It doesn't happen often, but soon you'll be able to "spot the spot" — Mercury's silhouette — as the innermost planet crosses the Sun's disk.
The editors of Sky & Telescope made our annual pilgrimage to last weekend’s Northeast Astronomy Forum. Here are our tales of the voyage to Pluto, the newest gadgets, and encouraging encounters with readers.
Yuri Milner commits $100 million to Breakthrough Starshot, a research and development project toward sending interstellar nanoprobes to Alpha Centauri.
Join the world’s largest celebration of astronomy — in person or via online webcasts of events — throughout April.
Roughly 2 million years ago, as the human ancestor homo erectus was descending from the trees, two supernovae exploded nearby and showered Earth with debris.
With the Moon finally put to bed and Comet 252P still bright, there's no better time than now to see it. Nearby Mars and Saturn only sweeten the deal.
On Sunday afternoon, April 10th, you'll see the waxing crescent Moon hanging high in a sunny blue sky if the weather is as good as we hope it'll be. Look with a telescope from nearly anywhere in North America, and you can find something else too. Somewhere in the Moon's vicinity will be 1st-magnitude...
Modern security threats have brought back an old method — celestial navigation — to help U.S. Navy sailors navigate the high seas.
What began as a student's simple idea a decade ago has grown into a worldwide celebration of the night sky and easy ways to reduce light pollution.
In breaking news today, astronomers have discovered Pi in the sky, proposed a revolutionary search for extraterrestrial environmentalism . . . and oh yes, April Fools’!
This month's astronomy podcast takes you on a guided tour of the night sky. You'll find Mars and Saturn near each other before dawn, while Jupiter and Mercury join the fading constellations of winter in the evening sky after sunset.
A new thermal map of a super-Earth exoplanet is puzzling astronomers.
Hidden within the subtle hues of the stars are the keys to their temperatures and compositions. Get acquainted with the classic OBAFGKM spectral sequence through real stars you can see on a spring night.
Two amateur videos shot early on March 17th show a brief but bright flash on the edge of Jupiter's disk. Did the King of Planets get whacked again?
Astronomers have measured the spin of one of the universe's most massive black holes — and provided evidence that the behemoth has a companion.
Ground controllers are scrambling to recover the Hitomi satellite from a mysterious 'debris anomaly' over the past weekend.
Observations by NASA's New Horizons spacecraft, combined with new modeling of long-term trends, suggest that Pluto's atmosphere is far more dynamic than anyone imagined.
Astronomers studying the infrared glow that pervades the universe have pinned down its source: dusty, faint, and faraway galaxies.
Splintered comet duo 252P/LINEAR and P/2016 BA14 liven up both dusk and dawn this week. Naked-eye 252P finally debuts in northern skies, while BA14 makes a beeline through the Big Dipper.
By tracking deviations in spacecraft orbits, planetary scientists have created a high-resolution map of the Red Planet's gravitational pull.
Astronomers have identified 53 “super spirals” — spiral galaxies that are huge and incredibly luminous — as part of a project exploring archived observations.