SUNSET: 
Dramatic Features in Pluto Close-Ups
New images from NASA's New Horizons spacecraft reveal a bewildering array of geologic features — all carved by or into exotic ices — on the surface of Pluto.
Own the Sky & Telescope Collection
The digital archive of Sky & Telescope magazine is an essential resource for astronomers at any level. And this weekend only, get $25 off.
Kepler Discovers Earth’s Closest Cousin Yet
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?
(Unofficially) Naming Pluto
Amidst all the excitement of seeing Pluto’s unique features for the first time, NASA researchers have been using unofficial names to talk science until official terms come down the pipeline.
"Breakthrough Listen": Giant Leap for SETI
A $100 million donation will radically speed up the search for artificial signals from the nearest million stars — and from trillions of much farther stars in the 100 nearest galaxies.
Last Chance to Discover Iceland with S&T!
On October 15, a group of us interested in seeing auroras and in exploring Iceland will meet in Reykjavík, the capital of this unique island. Want to join us?
High Definition Space Telescope — Hubble’s Successor?
A proposal released earlier this month calls for a giant orbiting space telescope that may revolutionize astronomy.
Buckyballs Solve Interstellar Mystery
Soccer ball-shaped molecules lurking in the dusty corners of the Milky Way help resolve a long-standing problem.
The Frozen Plain of Pluto
New images from NASA's New Horizons spacecraft reveal an ice-covered plain on Pluto that looks remarkably young and fresh.
An Inspirational Guide to the Sky
This “Black Friday in July” only, you can save 40% off this book, as well as off most items in our online store.
Astronomers Spot Unusual Five-Star System
Two binary systems and a fifth stellar wheel make for a rare, and so far unique, set of stars.
Pluto and Charon Dazzle with Diversity
In a mission filled with surprises, New Horizons spacecraft has left its scientists awed by the array of landforms and compositions found on Pluto and Charon.
A Sleeping Black Hole Awakens
On June 15th a quiet black hole, V404 Cygni, suddenly flared for the first time since 1989.
New Horizons Scans Pluto as Earth Awaits
New Horizons flew past Pluto and its moons earlier today, but the spacecraft stayed out of contact with Earth while finishing its historic observations.
New Horizons Buzzes Pluto
NASA’s New Horizons spacecraft whizzed by Pluto this morning just before 8 a.m. EDT at nearly 14 km/s (31,000 mph), about 12,500 km (7,750 miles) above the surface.
Pluto and Charon: The Odd Couple
With just one day remaining until New Horizons makes its historic flyby, missions scientists are amazed by the views of Pluto and Charon already in hand.
Naming Pluto’s Features
How will planetary scientists decide what to call the features they discover on Pluto and its moons?
The Most Luminous Supernova
Astronomers have discovered an exploding star that belongs to the "superluminous" class, and it's the most luminous one ever found.
Revealing Hidden Black Holes
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.
Down-Under Observers Track Pluto Cover-up
Deep snow, high winds, and dropped cameras didn't stop dozens of observers in New Zealand and Tasmania from recording Pluto's occultation of a bright star on June 29th.
