SUNSET: 
Once-in-a-Century Impact Made a “Cold Spot” on the Moon
In watching an impact's aftermath, scientists have confirmed that such large blasts shake up and cool wide swaths of the lunar surface.
Webb Telescope Discovers Surprising Changes in an Asteroid’s Rings
Painstaking observations have revealed unexpected evolution in the rings around Chariklo, a tiny outer-solar-system object.
Next Up! A Deep Partial Lunar Eclipse on Aug. 27–28
A near-total lunar eclipse wraps up August's trifecta of two major eclipses and the Perseids.
Spying on a Split Comet
Traversing through the solar system, a comet split in two, and a recent study used six months of observations to investigate when and why.
Inouye Solar Telescope Sees the Sun Closer Than Ever
Scientists observing the Sun with the Daniel K. Inouye Solar Telescope have caught a wave-like shape that's never been seen on the Sun's visible surface.
Astronomers Spot Weird, Three-Lobed Asteroid with a Moon
Asteroid 44 Nysa has the weirdest shape yet seen for an asteroid, and that’s saying something.
Jupiter’s Moon Io is Surprisingly Fluffy
Ash from countless volcanic eruptions on Io have likely built up its porous surface.
New Jersey Meteorite Offers Early Solar System Clues
When a meteorite tore through a New Jersey home, the homeowner quickly preserved the fragments. Now, they're giving scientists a look at Earth's early history.
Comet 10P/Tempel Brightens, Sets Sail South
This periodic visitor is now bright enough to see in binoculars from a dark sky. We also report on a bright supernova in Ursa Major.
Tianwen 2 Arrives at Quasi-Moon Kamoʻoalewa, Returns Images
China’s Tianwen 2 mission returns its close view of Earth's tiny "quasi-moon" Kamoʻoalewa.
Did a Passing Star Shower Us with Comets?
We might be living through a comet shower created by a star that millions of years ago jostled the Oort Cloud surrounding the solar system.
Hayabusa 2 Completes Flyby Past Asteroid Torifune
Japan’s Hayabusa 2 mission has revealed another "snowman" asteroid — a pair of asteroids attached with a narrow neck. The contact binary could help shed light on planet formation.
Interstellar Comet 3I/ATLAS Has Cold, Ancient Origins
The most recent interstellar visitor was crisscrossing our galaxy for some 10 to 12 billion years before it came near the Sun.
See Venus Disappear in Broad Daylight on June 17th
On June 17th, much of North America can watch the Moon occult Venus in the daytime sky. All you need are binoculars.
Did A Moon-Size Planet Grow Fast and Die Young in the Early Solar System?
A rare meteorite recovered from the Sahara Desert could be a fragment of a Moon-size body that met a violent end in the earliest days of the solar system.
Evidence of Water Plumes from Jupiter's Moon Europa Vanishes
Reanalysis shows that the Hubble Space Telescope's detection of water vapor escaping from Jupiter’s moon Europa might have been a glitch.
NASA's Psyche Sends Back Amazing Images of Mars
NASA’s Psyche asteroid mission made a course adjustment via a flyby past Mars en route to its final destination. Here's what it saw.
Nereid Could be Neptune’s Only Original Moon
New research suggests that Triton — or a Triton-like object — might have disrupted Neptune's original moon system. Nereid might be the sole survivor.
How Jupiter’s Moon Ganymede Melted Its Core
A new model explains how Ganymede got its molten core — which in turn has given Jupiter's largest moon its magnetic field.
Astronomers Find Atmosphere Around a Pluto-like World
Observations — including from an amateur astronomer — show that the Plutino 2002 XV93 has a thin wisp of air around it.