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.
A gigantic sunspot group, rotating into view on October 17th, has grown to nearly the size of Jupiter and could trigger potent solar storms in the days ahead.
NASA scientists have found three potential Kuiper belt objects in the nick of time, saving the Pluto-bound probe from missing out on half of its mission.
Find out where you can watch the partial solar eclipse taking place on October 23, 2014.
Just about everyone has heard of Halley's Comet, and each year in mid-October we get to witness a "shooting stars" spawned by this celebrated object.
On October 19th, Comet Siding Spring (C/2013 A1) passes breathtaking close to Mars — as a small army of spacecraft (five of them orbiting the planet) watch.
The gaseous object G2 has survived its swing around the Milky Way’s central supermassive black hole, but the questions of what it is and where it comes from remain unanswered.
Images from NASA's Lunar Reconnaissance Orbiter show dozens of small, curious features that might be volcanic eruptions in the past 50 to 100 million years. Countless astronomers, both amateur and professional, have spent untold hours scrutinizing the Moon through telescopes for hints of volcanic activity. Numerous claims of "transient lunar phenomena" (TLP) have been...