Telescopes only picked it up a week ago, but it's likely been traveling through interstellar space for millions of years.
A professional observatory in Greece has begun recording flashes created when bits of interplanetary debris strike the Moon.
You'd think scientists would have Saturn all figured out after watching it up close for 13 years. They don't.
When the distant dwarf planet Haumea briefly slipped in front of a star last January, astronomers found more than they expected.
Roughly 3.5 billion years ago huge volcanoes released enough gas to cover the Moon with a thin atmosphere that was visible from Earth.
The close pass of near-Earth asteroid 2012 TC4 this week will give NASA a chance to test planetary-defense coordination.
Here’s an opportunity for amateurs to help improve our understanding of Neptune’s moon Triton.
The 2017 solar eclipse could easily be the most watched event in US history. Can we learn something from it?
A new analysis maps out water across the lunar surface, revealing how its abundance changes with latitude.
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.