Are we really doing enough to find asteroids, especially the smaller ones that could destroy a city? A private initiative urges a rapid ramp-up of the search effort — but not everyone agrees.
The two brightest planets are gliding closer together in the early evening sky, and their celestial dance culminates with an ultra-close pairing on June 30th. Anyone who pays even cursory attention to the evening sky has surely noticed that the two brightest planets, Venus and Jupiter, have been drawing closer together in the west...
Hotspots on Venus might be researchers’ long-sought evidence for active volcanoes.
Stargazing in July is warm and pleasant. After sunset Venus and Jupiter are together in the west and Saturn is low in the south amid the stars of Scorpius.
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.
New ALMA observations reveal low levels of dust in nine early galaxies, suggesting astronomers should revise some of their calculations.
An auroral display on June 22nd surprised and delighted viewers in Northern America, Europe, and southern Australia.
Following on a surprising find reported last year, astronomers have now discovered almost 1,000 dark matter-rich galaxies in the Coma Cluster.
Researchers identify titanium oxide as a potential molecule at work in exoplanet atmospheres.
The winners of the 6th International Earth & Sky Photo Contest highlight the natural beauty of the night sky as well as its growing battle with light pollution.
Stars still embedded in their natal clouds act as signposts to map the Sagittarius-Carina, Perseus, and Outer spiral arms of the Milky Way.
Observations from NASA’s Lunar Atmosphere and Dust Environment Explorer (LADEE) have rekindled interest in dust clouds seen along the Moon’s day-night terminator.
Sunlight on Pluto is only a thousandth as strong as it is here on Earth. With careful timing, you can experience what it'd be like to stand on Pluto at noon.
It's no myth. Icarus makes a rare flyby of Earth this week. Here's how to see it in your telescope and live online.
After seven months of electronic hibernation, Philae has awakened on the surface of Comet 67P/Churyumov-Gerasimenko and resumed relaying its data to Earth.
Super-sharp imaging confirms that the nearby red giant star L2 Puppis is forming a tiny bipolar nebula as it comes to the end of its life.
On June 11, 2015, the moon will occult Uranus. Here's a webcast.
Scientists have detected glass in Martian craters, created by the fierce heat of impacts that melted the Red Planet’s surface.
Researchers confirm that three solitary stars have gone supernovae in intergalactic space.
Recent research casts doubt on whether nearby Kapteyn b, a supposed super-Earth circling in its star’s habitable zone, is a planet at all.
Visit the dwarf planet Ceres in this video animation created from images taken by NASA’s Dawn spacecraft.
Sky & Telescope's third annual trip to Iceland, this time accompanied by Equipment Editor Sean Walker, provides a fantastic opportunity to photograph the aurora borealis.
On May 31st, the Cassini spacecraft flew by Saturn’s funky moon Hyperion. The resulting images highlight the moon’s unusually pocked surface.
Sky & Telescope's introductory videos walk you through all aspects of buying, using, and caring for your first telescope.
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.