SUNSET: 
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.
New Horizons Hiccups, Goes into Safe Mode
Just 10 days before its history-making flyby of Pluto and its moons, NASA's New Horizons spacecraft briefly lost communication with Earth.
Rosetta Spots Sinkholes on Comet
The spacecraft orbiting Comet 67P/Churyumov-Gerasimenko has found 18 holes in the nucleus's surface.
It's Always "Pluto Time" Somewhere
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.
Comet Lander Philae Phones Home
After seven months of electronic hibernation, Philae has awakened on the surface of Comet 67P/Churyumov-Gerasimenko and resumed relaying its data to Earth.
Asteroid Tour: Fly Over Ceres
Visit the dwarf planet Ceres in this video animation created from images taken by NASA’s Dawn spacecraft.
What Will New Horizons See — and When?
In his third "insider blog" about the New Horizons mission, principle investigator Alan Stern offers a look at the timetable for getting results from the historic flyby.
Pluto: The Last Picture Show
In his second "insider blog" about the New Horizons mission, principle investigator Alan Stern offers a look at what we might find at Pluto. It sounds like science fiction, but it's not: NASA's New Horizons spacecraft is on final approach to the Pluto system! After 112 months in flight, the…
Messenger Crashes, Its Results Endure
After four years at Mercury, NASA's Messenger orbiter has finished its remarkable mission and crashed into the planet.
Hubble Telescope's Silver Anniversary
It's been 25 years since the Space Shuttle Discovery lofted the Hubble Space Telescope into orbit. Yet astronomers were not unanimous in their enthusiasm for the project, as this debate from 1990 recalls.
Dawn Maps Ceres in False Color
Thanks to NASA’s Dawn spacecraft, we’re finally seeing more of the asteroid Ceres than a fuzzy ball.
New Horizons: Navigating to Pluto
In the first of a series of installments written exclusively for Sky & Telescope, New Horizons principal investigator Alan Stern offers his behind-the-scenes perspective on what it took to get the spacecraft to Pluto.
NASA Selects Asteroid Mission Concept
NASA has selected the design for its Asteroid Redirect Mission, opting to retrieve a boulder from a larger asteroid.
MAVEN Spots Dust Cloud, Aurora on Mars
NASA’s MAVEN spacecraft has detected dust high in Mars’s atmosphere and auroras across the planet’s northern hemisphere.
Messenger Reveals Mercury Mysteries
With just weeks left before it crashes into its host planet, NASA's Messenger spacecraft is making the most of its extremely low altitude and finding that Mercury isn't a completely dead world.
Magnetosphere Mission Launches
With the goal of better understanding Earth’s space weather environment, NASA’s Magnetospheric Multiscale (MMS) mission launched just over an hour before midnight on March 12th from Cape Canaveral.
Lots of Lunar Layers Under Chang'e 3
A radar sounder aboard China's first-ever lunar lander found at least nine discrete subsurface layers at its landing site in northern Mare Imbrium.
Dawn Orbiter Reaches Dwarf-Planet Ceres
The long-distance traveler has finally arrived at the first dwarf planet (and largest asteroid) yet studied by spacecraft.
Bright Spots on Ceres Intrigue Scientists
Incoming views of the asteroid belt's largest body reveal spots where ice from the interior might be exposed on the surface.
Pluto and Charon’s Gravitational Dance
This image series, taken by NASA’s New Horizons spacecraft in late January 2015, reveals the dwarf planet Pluto and its largest moon, Charon, orbiting their common center of mass.
