SUNSET: 
Oldest Moon Rocks Found on the Lunar Farside
The 4-billion-year-old Moon rocks brought back from the farside of the Moon challenge ideas about what it was like in the early solar system.
New Study Identifies Organic Molecules Spewing from Saturn's Icy Moon Enceladus
The discovery of a new array of molecules spouted from Enceladus indicates new promise for habitability within its frozen-over ocean.
Webb Telescope Finds Interstellar Comet Has Unexpected Composition
Observations with the James Webb Space Telescope have shown the new interstellar Comet 3I/ATLAS is surprisingly rich in carbon dioxide.
Why Is Mars Red?
Martian dust is red because of rust — but the rust on Mars is not the same iron oxide mineral found on Earth.
Perseverance Reaches Rim of Jezero Crater
It’s been a long upward climb for NASA’s premier rover. But the commanding view — and the geology — were worth it.
Oldest and Largest Impact Crater Found on Venus
Scientists have found possibly the oldest and largest crater on Venus — and it's like none they've ever seen on our sister planet.
We’ve Found the Source of Most Meteorites
Scientists have traced 70% of meteorite falls to three collisions that occurred in the asteroid belt within the past 40 million years.
Did a Ring of Rocks and Dust Orbit Earth Before the Dinosaurs Roamed?
A team of scientists thinks a clustering of ancient impact craters points to a temporary ring around Earth hundreds of millions of years ago.
Does This Mars Rock Show a "Potential Biosignature"? Or Just "Wet Chemistry"?
"Leopard spots" on a Mars rock could come from life — or they could simply be a sign of a type of chemical reaction that requires water.
NASA's Lucy Mission Reveals Asteroid's Strange Moon
The asteroid Dinkinesh surprised NASA’s Lucy mission when it turned out to have a moon. Now, scientists are taking a closer look at the pair’s formation.
Amateur Astronomers Caught Sungrazing Comet during Solar Eclipse
Wide-field photos of the total solar eclipse taken by several astronomers along the path of totality, caught a comet approaching the Sun.
Astronomers Find New Moons of Uranus and Neptune
The three new moons for Uranus and Neptune are each part of a "family," groupings that fragmented from a single parent object.
NASA's DART Impact Reshaped the Asteroid Dimorphos
Models of the NASA's DART impact reshaping the asteroid moon Dimorphos show that this object is "rubble all the way down."
Buried Polygons on Mars Point to “Stark Environmental Transition”
Polygons buried beneath the surface of Mars indicate an abrupt transition in the planet's early history.
Do Glaciers on Mercury Suggest Such a Planet Could Be Habitable?
Salt glaciers on Mercury suggest conditions friendly to life — but not life itself — might once have existed on the innermost planet.
Marsquake Reveals Molten Layer Above Martian Core
An impact far from NASA's Insight lander on Mars set off seismic waves that revealed new details about the Martian interior.
Rubble-Pile Asteroid Bennu Has Layers
The asteroid Bennu is a so-called rubble pile, but new results from NASA's OSIRIS-Rex mission indicate this heap of rubble has layers.
Did an Asteroid's Collision Make the Geminid Meteor Shower?
Parker Solar Probe data offers new insight on the puzzle of how debris from an asteroid produces one of the brightest annual meteor showers.
New Discoveries Double Number of "Irregular" Saturn Moons
The Minor Planet Center is announcing a bevy of new moons for Saturn that will bring its total to 145 (and break Jupiter's record).
Second Ring Around Quaoar Puzzles Astronomers
There's a second ring around the far-out dwarf planet Quaoar, adding to the mystery of how this world hosts rings at such wide orbits.
