Astronomers have discovered a spike of X-ray emission in galaxy clusters — “ordinary” interpretations don’t hold up, so some are turning to dark matter for answers.
Despite skepticism from scientists and politicians alike, NASA is proceeding with its asteroid redirect mission and has found six candidates for exploration so far.
Newly published observations provide the first real evidence supporting a theory that tells us how black hole jets form.
Toddlers can gain a great deal from star parties, more than we might think possible. Here are some further resources for engaging youngsters at your next event.
A new study finds every stage of star formation in a single cloud, firmly backing a popular star-formation recipe.
Galaxies’ central black holes are surprisingly simple creatures at heart, but they have a complicated past. New studies are starting to remove history’s obfuscating veil.
A hive of stars is sailing toward Earth at more than 2 million miles per hour — and racing away from the giant galaxy it used to call home.
A bizarre X-ray flare first spotted in 2010 could be a signal from two black holes that will ultimately unite into a single beast.
The editors of Sky & Telescope are excited to announce that we are unveiling a new look for our website – check back on April 10th for the new design!
PURCHASE PRINT ISSUE | PURCHASE DIGITAL ISSUE | DOWNLOAD BACK ISSUES | SUBSCRIBE Storm warning! Get the latest on the new meteor storm predicted to hit Earth's skies on May 24th, and learn about the even weirder weather developing on alien worlds beyond the solar system. Also catch up on techniques to observe Saturn...
Here’s what you need to know about a new fundraising venture, the race to name 500,000 craters on Uwingu’s Mars map.
Announcing the winners of Sky & Telescope's Comet ISON photo contest, sponsored by Celestron.
A radioactive element produced near the heart of collapsing stars hints at the mechanism behind Cassiopeia A’s supernova explosion.
Astronomers using a novel technique have mapped a brown dwarf's visible surface — even though they can't resolve the object in telescopes.
A rare alignment of a quasar’s “flashlight” beam and a filament of the cosmic web illuminates the universe’s large-scale structure.
Miniature robots crawling along glass plates will help big surveys collect light from hundreds of thousands of galaxies.
From high-altitude clouds discovered on a super-Earth to massive, hurricane-force storms on a nearby brown dwarf, a bevy of results show that the age of “astrometeorology” is upon us.
The comet's come and gone, we've selected our photo-contest finalists, now it's your turn! Tell us which photos you think should take 1st, 2nd, and 3rd place. The polling booth closes on January 22nd.
Astronomers have found supermassive black holes in 151 dwarf galaxies, surprising expectations and providing a time machine into black hole formation.
Most alien planets are nothing like what we've got in the solar system. Scientists are homing in on these mysterious worlds to see what they’re made of.
Robert Zimmerman writes in the March 2014 issue about the construction of the Giant Magellan Telescope, "demonstrating astronomical engineering of the highest order." The mammoth telescope will combine seven 8.4-meter (28-feet) mirrors into a flower-like primary with the resolving power of a mirro 24.5 meters (80 feet) wide. But the Giant Magellan Telescope isn’t...
The gossamer veil of reflective dust surrounding the star RS Puppis reflects its flickering light in a fantastic display.
Astronomers have come up with a new technique for measuring an alien planet’s mass, and therefore its composition and potential habitability, even when standard methods don’t work.
The "comet of the century" famously lost its battle against the Sun, but you can still enter our photo contest for a chance to win some hefty prizes. Don't miss the December 31st deadline!
Two teams have announced the discovery of water on alien worlds. But they found less water than expected, suggesting these planets are surrounded by a high-altitude haze.