At last, a fine Mars apparition: on May 22nd the Red Planet reaches opposition, shining almost as bright as Jupiter, and the planet makes its closest approach to Earth on May 30th.
In 2015 ASASSN-15lh gained fame as the most luminous supernova ever discovered. Almost a year later and against all odds, the supernova has rebrightened.
The European Space Agency is opting to send its first rover to the Red Planet two years later than originally planned.
Join your local amateur astronomy community in celebrating Spring Astronomy Day on May 14, 2016.
May 9th's transit of Mercury is now history. Countless amateurs — and professionals — watched as the innermost planet had its day in the Sun. It's sometimes the curse of being involved in astronomical outreach that I miss all the action during an important celestial event. For example, I never got to see Comet Shoemaker-Levy…
Even though Kepler’s primary mission ended three years ago, the data it collected just revealed a mother lode: 1,284 newly confirmed planets.
Join in Monday, May 9th, as tiny Mercury crosses the Sun's disk for the first time since 2006. S&T's exclusive video feeds and expert interviews will air throughout the 7½-hour event.
The littlest planet will cross the enormous Sun for viewers in most of the world.
Scientists might have found the source of an incredibly energetic particle that bored into the Antarctic ice sheet.
If you'd like to see bits of debris shed by Halley's Comet, then head out before dawn during the next few days.
Light’s finite speed helped astronomers pinpoint the location of the “inner wall” of the disk of dust and gas that’s feeding a fast-growing baby star.
Astronomers just discovered three planets, two of which are roughly the size of Earth, orbiting a dim nearby dwarf star. Their proximity makes their atmospheres ripe for observing.
Russia's Mikhailo Lomonosov observatory takes to the skies on the hunt for gamma-ray bursts, cosmic rays, and near-Earth asteroids.
Sky & Telescope's astronomy podcast takes you on a guided tour of the night sky. Watch for Mars and Saturn near Scorpius before dawn and Jupiter near Leo after sunset.
Astronomers have been searching for companions to the distant dwarf planet Makemake for years. Finally, they've spotted one.
Astronomers have discovered a “feeble giant”: one of the largest dwarf galaxies ever seen around the Milky Way.
The Japanese space agency JAXA has released a timeline covering the Hitomi space observatory's failure last month. Salvage efforts continue but recovery appears unlikely.
It’s a bird! It’s a plane! It’s a . . . pair of hypervelocity stars? The surprising stellar duo may place constraints on the mass of our galaxy’s unseen dark matter halo.
The Kepler team unexpectedly found the planet-hunting spacecraft in emergency mode on April 7th, but with the spacecraft recovered, hopes are high that its newest search, this time for rogue planets, is still on. Read on to see how amateur observations can help!
NASA’s Fermi Gamma-ray Space Telescope might have detected a burst from the same merging black holes that emitted the gravitational waves LIGO detected.
Join Sky & Telescope Observing Editor JR Johnson-Roehr for our fourth annual trip to Iceland to see the northern lights.
Astronomers using the ALMA array of radio dishes have detected a dwarf galaxy 4 billion light-years away by the pull of its dark matter.
Our state-of-the-art representation of the entire celestial sphere lets you explore the stars above as never before.
Planetary scientists have increasing reasons to think that some of the ringed giant’s moons are only 100 million years old.
If you've never seen the fleet-footed planet Mercury, now is a great time to look for it in the evening sky after sunset.