After 13 years of orbiting the Saturn system, and 4.9 billion miles logged, the Cassini mission has ended, vaporized on re-entry into the ringed planet.
As Cassini dives into Saturn's atmosphere this Friday, ending 13 years of exploration, expect to probe the ringed planet's mysteries as never before.
Two years after New Horizons captured the first high-resolution image of Pluto, the IAU releases official names for some of its features.
A new analysis shows that nearly 100 stars buzz our solar system every million years — an effect that can hurl regular cosmic hailstorms of comets toward Earth.
Scientists and astronomy enthusiasts are coming together to celebrate two spacecraft, billions of miles beyond Earth, as they head for the stars.
A large Earth-approaching asteroid, now sailing near Earth, has a lumpy shape and is accompanied by a pair of tiny moonlets.
Florence, one of the largest Earth-approaching asteroids, gets close enough to see in a small telescope this week and next. Here's how to find it.
With our editors and writers scattered across the eclipse path today, here are our stories on the total solar eclipse.
Updated 8/16 to include Predictive Science, Inc.'s predictions. The total solar eclipse is less than three weeks away, but researchers already have a good indication of how the Sun’s corona will look when it comes into view.
Barely visible water-ice clouds coast across Mars’s skies in new videos from the Curiosity rover.
A huge, white storm is raging on Neptune, and its location is baffling astronomers. How can a storm system this large exist at the planet's equator?
A challenging and intensive campaign by telescope-toting teams yields big-time results on the body that the New Horizons spacecraft will fly past in 17 months.
Solar astronomers may have finally detected gravity waves in our star’s core, revealing that the Sun’s central region rotates about four times faster than the outer layers.
Saturn keeps its secrets as NASA's Cassini spacecraft heads towards its September grand finale.
A new study proposes a possible source for the mysterious Mars Trojan asteroids: the Red Planet itself.
The Sun, now halfway through its life, might be slowing its magnetic activity, which could lead to permanent changes in the sunspots and auroras we see.
A team of amateurs observers, some armed with just 3-inch telescopes, have found that the main-belt asteroid 113 Amalthea probably has a small companion.
NASA's Juno Spacecraft delivers stunning closeup views of Jupiter's famous swirling Great Red Spot storm.
A recent NASA study outlines possible dedicated missions to the "ice giant" planets Uranus and Neptune that might leave Earth as early as 2030.
Are astronomers being misled about a possible ninth planet by the quirky alignment of orbits that they’re finding in the distant Kuiper Belt?
Xenon measured by the European Space Agency's Rosetta spacecraft has shed light on a long-standing mystery about the role comets played in Earth's formation.
On June 3rd, two dozen teams of observers in South America and South Africa tried to learn something about distant 2014 MU69, which New Horizons will visit in early 2019.
NASA's Parker Solar Probe, set to launch in 2018, will be humanity's first effort to "touch the Sun," revolutionizing our understanding of the Sun's corona, the solar wind, and the greater heliosphere.
Just a mile across, a pair of moonlets found orbiting Jupiter bring the planet's total satellite count to 69.
Flash! A comet or asteroid fragment whacked Jupiter on May 26th. It's the sixth time that observers on Earth have witnessed an impact on the giant planet.