A lab experiment has all but nixed one of the theories of dark energy, a mysterious force pushing the universe apart.
The Gemini Planet Imager has discovered its first exoplanet, a young Jupiter still glowing with the heat of its formation.
The cover story of the October 2015 issue features the conundrum of massive star formation: how do these stars can form at all in the hostile environment they themselves create? Here, you'll find accompanying videos.
Recent headlines proclaim that the universe is dying, but we’ve actually known that for decades. Here’s what’s really interesting about recent research on the nearby universe.
Super-Earth HD 219134b is just 21 light-years away, orbiting a nearby orange star that you can see from your backyard.
On Earth, wind can transform entire landscapes - turns out the same is true in space. Galaxy NGC 4921 faces an intracluster wind that's eroding its star-forming terrain.
The digital archive of Sky & Telescope magazine is an essential resource for astronomers at any level. And this weekend only, get $25 off.
The Kepler team announced today the discovery of Kepler-452b, an Earth-size planet in the “goldilocks” zone around a Sun-like star. But is it Earthlike?
Soccer ball-shaped molecules lurking in the dusty corners of the Milky Way help resolve a long-standing problem.
Astronomers have discovered an exploding star that belongs to the "superluminous" class, and it's the most luminous one ever found.
The NuSTAR telescope has spied high-energy X-rays from five supermassive black holes shrouded in a thick veil of dust and gas, a test run that will lead to a better census of these hidden beasts.
Astronomers have come upon the tantalizing signal from some of the universe’s first stars.
Combining a novel technique and a world-class telescope, astronomers have measured the mass of the supermassive black hole at the center of barred spiral NGC 1097.
Following on a surprising find reported last year, astronomers have now discovered almost 1,000 dark matter-rich galaxies in the Coma Cluster.
Stars still embedded in their natal clouds act as signposts to map the Sagittarius-Carina, Perseus, and Outer spiral arms of the Milky Way.
The chaos of stars strewn across a dark sky offers a lesson in awe and humility. Master your own night sky when you take 40% off our planisphere and other get-started astronomy products, now through Sunday.
New analysis of Kepler observations shows that hot Jupiters' temperatures might predict their weather report.
Astronomers have detected a massive yet elusive nimbus of hot gas surrounding Andromeda Galaxy.
Two projects are mapping the distribution of dark matter in the universe, probing scales both large and small.
NASA’s NuSTAR mission has detected an unexpected haze of high-energy X-rays in our galaxy’s center, perhaps the signal of a mass stellar graveyard.
New evidence suggests that nanoflares, small but potent bursts of energy, might heat the Sun’s atmosphere. But not everybody’s convinced.
A galaxy-size blob of gas discovered eight years ago by a Dutch schoolteacher has galvanized the study of the spectral remains of once-bright quasars.
A rare type of gravitational lens offers astronomers a close look at a young, dusty galaxy manufacturing hundreds of stars a year.
A team of astronomers compared two images taken 18 years apart to catch the dramatic evolution of a forming star and its surroundings.
Dozens of galaxy clusters confirm that dark matter particles slip right past each other within messy cluster mergers.