Just 10 days before its history-making flyby of Pluto and its moons, NASA's New Horizons spacecraft briefly lost communication with Earth.
Despite an 11th-hour scramble due to an unexpected in predictions, NASA's flying observatory was in the right place at the right time on June 29th as distant Pluto briefly covered a 12th-magnitude star.
The spacecraft orbiting Comet 67P/Churyumov-Gerasimenko has found 18 holes in the nucleus's surface.
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.
Hotspots on Venus might be researchers’ long-sought evidence for active volcanoes.
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.
Scientists have detected glass in Martian craters, created by the fierce heat of impacts that melted the Red Planet’s surface.
Visit the dwarf planet Ceres in this video animation created from images taken by NASA’s Dawn spacecraft.
On May 31st, the Cassini spacecraft flew by Saturn’s funky moon Hyperion. The resulting images highlight the moon’s unusually pocked surface.
Rosetta continues to help astronomers better understand the way comets form and how they interact with the universe around them.
New data on Pluto’s moons show that the system is more bizarre than previously thought.
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.
For sunwatchers who've been disappointed by this weak solar maximum, Active Region 2339 offers something to cheer about.
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 fastest spacecraft ever launched...
After four years at Mercury, NASA's Messenger orbiter has finished its remarkable mission and crashed into the planet.
New evidence suggests that nanoflares, small but potent bursts of energy, might heat the Sun’s atmosphere. But not everybody’s convinced.
Thanks to NASA’s Dawn spacecraft, we’re finally seeing more of the asteroid Ceres than a fuzzy ball.
Amateur astronomy has lost a true pioneer, a keen observer who founded the worldwide Association of Lunar and Planetary Observers.
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 has selected the design for its Asteroid Redirect Mission, opting to retrieve a boulder from a larger asteroid.
NASA’s MAVEN spacecraft has detected dust high in Mars’s atmosphere and auroras across the planet’s northern hemisphere.
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.
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.
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.