The Grand Finale is underway, as NASA's Cassini spacecraft sails through a clear gap between Saturn and its rings.
Cassini's Grand Finale has begun, as the spacecraft threaded the needle between Saturn and its rings, following several fantastic moon passes and a final glance back at Earth.
LISA Pathfinder, the technology testbed mission for a future gravitational-wave detector, turns out to be a surprisingly good micrometeoroid hunter.
Planetary scientists think the Sun may inadvertently create a transitory, tenuous atmosphere around the dwarf planet Ceres — and in an unexpected way.
NASA’s MAVEN mission has confirmed that the solar wind stripped the Red Planet of its atmosphere.
The strange bright deposits inside Occator crater on Ceres are probably from cryovolcanic eruptions that are much younger than the crater itself.
SpaceX's surprise announcement envisions humans traveling beyond low-Earth orbit and to the Moon at the end of 2018.
The Dawn spacecraft has detected organic compounds on the dwarf planet Ceres.
Three possible landing sites are now in the running for the U.S. space agency's next Mars rover.
Astronomers have combined data from the Voyager spacecraft and the Hubble Space Telescope to probe the stuff between the stars.
Last week, NASA announced two new missions set to explore the earliest remnants of the solar system: asteroid 16 Psyche and Jupiter's Trojan asteroids.
The Chandra X-ray Observatory has gazed at a small patch of sky for almost 12 weeks, revealing 1,008 X-ray-emitting sources — most of them supermassive black holes.
An exciting year lies ahead for spaceflight involving astronomy and planetary science — by NASA and by other spacefaring nations.
From the discovery of gravitational waves to the building evidence that a massive planet could exist beyond Pluto, it has been a thrilling year for astronomy research. We recap.
This beautifully detailed 6-inch globe lets you explore the amazing geology revealed by New Horizons during its historic 2015 flyby.
New results from NASA's Dawn orbiter show that the largest asteroid (and acknowledged dwarf planet) must possess a global layer of water ice that lies just below its dark, dusty surface.
Curiosity scientists have tracked Gale Crater’s changing environment as it became more, then less, acidic over millions of years. Microbial life could have survived in these conditions.
Welcome to Mars: the European Space Agency's ExoMars Trace Gas Orbiter sets up shop around the Red Planet.
Find out how to see a cargo mission headed to the International Space Station this weekend.
John Glenn, the first American to orbit Earth, dies at 95.
NASA's Cassini spacecraft delivers stunning views from its new orbital perch.
Cassini's final main engine burn this weekend sets up the first act of a grand finale.
A big, nitrogen-ice-filled basin has apparently caused Pluto's entire crust to shift over time.
There's a good chance to catch a rocket launch at dusk on Saturday night, when an Atlas V rocket with GOES-R takes to space.
An innovative technique sheds new light on what doomed Britain's Beagle 2 spacecraft when it tried to land on Mars in 2003.