SUNSET: 
Tsunamis Carried Boulders Across Ancient Martian Ocean
Long-ago impacts tossed up the floors of an ancient ocean on the Red Planet and carried debris to the landing site of NASA’s Viking 1 lander.
Gamma-ray Burst Surprise: Hybrid Merger Made Magnetar
Gamma-ray bursts are generally thought to come in two flavors — supernovae or neutron star mergers. But discoveries are blurring that line.
New Images Track Clouds on Saturn's Largest Moon
Brand-new images from the James Webb Space Telescope and the Keck Observatory in Hawai'i reveal clouds beneath the haze on this enshrouded moon.
X-rays Offer View Inside the Black Hole-Powered Plasma Guns
Polarized X-rays are helping astronomers take a closer look at blazars’ “plasma guns,” the particle jets powered by supermassive black holes.
Webb Telescope Reveals Starbirth in a Riot of Colors
A riot of colors in this James Webb Space Telescope infrared image show the warm glow of a feeding infant star, representing a look back in time at a star very like the Sun.
Hubble Spies Supernova in Early Universe
Archival Hubble Space Telescope images taken more than a decade ago have revealed an ancient star in the act of exploding.
Lightest Neutron Star Ever? Maybe, Maybe Not
A team of astronomers claims to have measured the lightest neutron star, but others say extraordinary claims require extraordinary evidence.
National Science Foundation Will Not Rebuild Arecibo
While the NSF plans to establish an educational center at the Arecibo Observatory, the institution has stated it will not fund science there.
Winking Stars Help Map Asteroids — and Discover a New Moonlet
An innovative method enables astronomers to gauge the size and shape of a distant asteroid — and potentially any km-scale object in the solar system.
Dance of Giant Stars Creates Ripples of Dust
Every time two giant stars swing around each other, they enrich the cosmos with complex organic molecules.
Watch "Astronomy's Workhorse" in Action
Fly through Sloan Digital Sky Survey data, watch what the team has to do to produce these observations, and see an artistic interpretation of the process and science.
Neptune's Rings, Jupiter's “Frosted Cupcakes,” and 3D Views of Mars
Three solar system emissaries have returned beautiful and even interactive vistas of Neptune, Jupiter, and Mars.
Webb's Exoplanet Data Are Almost Too Good
A new study urges caution in interpreting the chemical fingerprints that Webb is collecting of alien worlds.
Perseverance Finds Ancient Habitable Conditions (But Not Yet Life) on Mars
The mission team has reported results from Perseverance's study of the rocks deposited by the river that once flowed into Jezero Crater.
Webb's Dazzling Views of the Orion Nebula
The James Webb Space Telescope has provided its first views of the Orion Nebula, revealing infant stars and the filaments that feed them.
Blazar's Outburst Hid Repeating Signal
Pulses originating almost a billion light-years away hint at extreme physics near a supermassive black hole.
Webb Captures an Exoplanet, a Brown Dwarf — and a Giant Tarantula
New Webb images reveal the space telescope's first exoplanet, first brown dwarf, and a stellar nursery teeming with activity.
Years of Tensions at Mauna Kea May End with Peaceful Negotiations
New stewardship of Mauna Kea, a dormant volcano that hosts some of the world's largest telescopes, could change the face of astronomy at the summit.
Webb Reveals Jupiter, Puffy Planet, and Galactic Maelstroms in a New Light
Round out your week with these stunning views of the universe from the James Webb Space telescope.
How Astronomers Are Rendering the Universe in Sound
Presenting data as sound can open new opportunities for accessibility, engagement, and discovery, but the technique still faces challenges.