Despite rescue efforts, no one has heard from one of two NASA spacecraft on the far side of the Sun since October 1st.
A bizarre set of galaxies in the Coma Cluster have lost most of their stars (or star-making material), making them especially rich in dark matter.
Scientists think they've figured out what causes the mysterious ruddy coloring in the giant planet's enormous oval storm.
With its battery power failing, Philae became the "little lander than could" and managed to return results from all 10 of its science instruments before slipping into hibernation.
After free-falling toward Comet 67P/Churyumov-Gerasimenko for seven hours, ESA's Philae lander bounced on the surface twice before finally coming to rest.
A fresh look at a nagging problem — asteroids moving in comet-like orbits — concludes that asteroids must make up about 4% of the vast, distant Oort Cloud of comets. When a telescope atop Hawaii's Haleakala swept up a fast-moving object in August 1996, astronomers didn't know what to make of it. Designated 1996...
Have you ever spotted the glow of a “false dawn”? Now astronomers have spotted a similar zodiacal light around nine nearby stars.
See the selection of new telescopes and astronomy products unveiled at the 2014 Arizona Science & Astronomy Expo.
On the much anticipated opening weekend of Interstellar, senior contributing editor Bob Naeye reviews the movie's facts and foibles.
The Rosetta spacecraft reached its objective, Comet 67P/Churyumov-Gerasimenko, in August. Since then, one instrument has been "smelling" the mix of gases escaping from the comet's nucleus.
An ALMA submillimeter-wavelength image unveils the dawn of planet formation around a surprisingly young star in unprecedented detail.
Often ignored in off years, why not treat yourself to the Leonids this month, a shower famed for fireballs and smoke trails.
A Chang'e spacecraft swung around the Moon and its capsule landed safely on Earth — a dress rehearsal for a future mission to bring back lunar samples.
The appropriately named Stella Kafka has been named the newest in a series of esteemed directors of the American Association of Variable Star Observers.
The University of Hawai'i, in partnership with the University of Arizona and Lockheed Martin, will sustain operations of the UKIRT infrared telescope.
A mythic drama plays out in the stars above on November evenings. Taking center stage, almost directly overhead at nightfall, is Cassiopeia, the Queen.
Astronomers are peering into a galaxy cluster’s past, using Hubble’s Frontier Fields to measure the light from ghost stars cast adrift in galaxy collisions.
Mercury moves fast around the Sun and changes location in the sky quickly. But you can spot it before sunrise in early November. Here's the info you'll need!
Senior contributing editor Bob Naeye recently led a Sky & Telescope tour of Iceland, where 50 astrotourists were treated to spectacular views of the Northern Lights.
The comets in the infant planetary system around the star Beta Pictoris fall into two distinct families, with one reminiscent of the solar system’s Kreutz sungrazers.
Readers share their experiences of the October 23, 2014 partial solar eclipse.
Mars-orbiting spacecraft escaped unscathed by Comet Siding Spring's close approach to the Red Planet — and unique scientific observations are now streaming back to Earth.
Find everything you need to enjoy today's partial solar eclipse — where to go, what you'll see, weather forecasts, and just in case, an online backup plan.
New IRIS results show a Sun rife with twisting and snapping magnetic fields, data that will elicit clues on what bakes the puzzlingly hot corona.
Most of us are familiar with the Seven Sisters, but have you met their brothers? Learn how to find more Pleiades than first meet the eye.