SUNSET: 
Solar System Featured on New U.S. Stamps
The U.S. Postal Service has unveiled new stamps, to be issued later this year, that feature 10 solar-system objects — including Pluto.
CubeSats: Future Solar System Explorers?
An innovative and tiny thruster design could prove the future of interplanetary exploration with the tiny satellites known as CubeSats.
Martian Gullies: Triggered by Dry Ice?
Are enigmatic gullies seen on many steep Martian slopes caused by liquid water or instead by episodic coatings of frozen carbon dioxide?
NASA Nixes Launch of InSight in March 2016
A mechanical problem in the spacecraft's seismometer can't be fixed before the planned launch date, so NASA managers have postponed the mission until 2018.
NASA's Plans for Putting Humans on Mars
Scientists and engineers gathered together to figure out what would make a good Martian landing site and what hurdles they’ll have to overcome for a 2035 launch.
China Launches Dark Matter Probe
China's recently launched Dark Matter Particle Explorer (DAMPE) takes the hunt for elusive dark matter to space.
New Star and Exoplanet Names OK'd by IAU
Following a wildly popular contest, the International Astronomical Union has named 14 stars and 31 planets that orbit them.
Bright Spots on Ceres: Mystery Solved?
Results from NASA's Dawn spacecraft hint that the stark brightenings in and near scores of craters on Ceres might result from salty brines seeping onto the surface.
Japan’s Akatsuki Reaches Venus . . . At Last
Engineers executed an innovative contingency plan to save the Akatsuki spacecraft and place it in orbit around our sister planet.
LISA Pathfinder Heads to Space
An exciting new mission takes the hunt for gravitational waves into space.
Where and When Will Rosetta Crash?
As ESA's comet orbiter enters its final year of operations, mission managers are deciding its fate.
Pluto's Cold Atmosphere and "Volcanoes"
Four months after New Horizons' historic flyby, mission scientists have been amazed by unexpected discoveries — and by how some preconceptions about Pluto were flat-out wrong.
Mars Losing Gas to Solar Wind
NASA’s Mars orbiter MAVEN has painted a detailed picture of how the solar wind robs the Red Planet of its atmosphere.
Mystery Object to Reenter Earth's Atmosphere
WT1190F will burn up over the Indian Ocean on November 13th, giving researchers an unprecedented opportunity to follow its path — and figure out where it came from.
Cassini Flies Through Enceladus's Plume
On October 28th, the Cassini spacecraft took its deepest dive through the water plume spewing from the south pole of Saturn’s moon Enceladus. It passed only 30 miles (50 kilometers) above the icy surface.
"Top 10" Surprises from the Pluto Flyby
New Horizons' principal investigator describes the most amazing discoveries made when NASA's New Horizons spacecraft flew past Pluto last July.
The Curious Case of KIC 8462852
The Kepler spacecraft recorded a bunch of irregular dimmings around one of its target stars, designated KIC 8462852. No natural phenomenon explains the dips well.
How to Spot the USAF’s ‘Mini-Shuttle’
Now is the time to track the secret space plane X-37/B on its OTV-4 mission.
Pluto-Charon Results Highlighted in Science
Forget the high-octane press releases. NASA's New Horizons team has detailed the mission's early results in today's issue of Science.
