NASA has announced that its Juno spacecraft will remain in a wide-ranging orbit around Jupiter, extending the mission's lifetime.
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.
Scientists are studying 400-year-old data to predict space weather in the coming decades — and it seems that future may hold fewer Northern Lights.
A study of ancient meteorites has refined the date for the dissolution of the solar nebula, the cloud that shrouded our Sun in its earliest days.
NASA's Juno spacecraft continues to give us amazing views of Jupiter, now from its fourth perijove pass.
A recent study found micrometeorites in piles of dirt collected from urban European rooftops.
NASA's Cassini returns stunning new views of Daphnis and friends from its ring-grazing orbits.
Japan's Venus orbiter has witnessed a huge atmospheric wave that spans the globe.
New studies offer contrasting scenarios for making the Moon. One argues for a one big splat early in solar-system history; a second envisions a score of lesser blows that built up the Moon over time; and a third suggests water was involved.
The Sun has been unusually quiet lately. Since the start of 2017, only a single tiny sunspot has made a brief appearance on the solar disk.
Astronomers have combined data from the Voyager spacecraft and the Hubble Space Telescope to probe the stuff between the stars.
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.
NASA's Cassini spacecraft delivers stunning views from its new orbital perch.
Planetary scientists have pinpointed the size of a near-Earth asteroid to be a mere 2 meters, one of the smallest ever characterized.
Cassini's final main engine burn this weekend sets up the first act of a grand finale.
Astronomers are debating the existence of a big planet beyond the orbits of Pluto and Neptune. Dr. Michelle Thaller talks with planetary scientists Scott Shepard and Mike Brown about when we'll discover it.
Dug out of a Texas field last year, the second-largest chondrite ever found in the U.S. has been donated to Texas Christian University.
A big, nitrogen-ice-filled basin has apparently caused Pluto's entire crust to shift over time.
NASA's intrepid Mars rover gets a close-up view of a bizarrely shaped space rock that landed on the lower slope of Mount Sharp.
Thanks to two aggressive search programs, the count of near-Earth asteroids has soared past the 15,000-object milestone. (None of them are likely to hit us.)