SUNSET: 
Webb Telescope Peers into Puffy Planet with Clouds of Sand
A mere 200 light-years away, there's a planet with the density of styrofoam and clouds of sand. How did it get so weird?
New Cosmology Probe Presents First, Stunning Images
The Horsehead Nebula and other stunning scenes highlight the talents of the just-launched Euclid mission. The telescope will reach into the depths of the cosmos to understand dark matter and dark energy.
Ghost-like Galaxy Defies Dark Matter Model
Astronomers have discovered a large but very dim ghost-like galaxy. Its existence challenges our notions of dark matter.
Largest-ever Computer Simulation of the Universe
The Flamingo simulations are not only the largest but also the most all-encompassing simulations of the universe, from 13.75 billion years ago to today.
Surf’s Up: Waves Might Be Breaking on This Star
An unusual star system that brightens and fades every month might have giant plasma waves breaking on its surface.
Does the Hyades Star Cluster Harbor Black Holes?
The nearest black holes might be hiding just around the corner, 150 light-years away in the Hyades star cluster.
Astronomers Find Mysterious, Slowly Pulsing Star
An unidentified source has been beaming out a pulse of radio waves every 22 minutes since 1988.
Gravitational Waves from Supermassive Black Holes Revealed
Radio observatories across the globe have found compelling evidence for the existence of very-low-frequency gravitational waves.
Mystery Bursts Give Astronomers a View into Galaxy Halos
Flashes of radio waves — whose exact sources are still a bit of a mystery — are helping astronomers learn about the hot gas that surrounds the Milky Way.
The First Stars Weren’t Born Alone
New evidence suggests the first stars to shine in the universe formed in groups.
Amateur Astronomers Find Glowing Gas Arc Near Andromeda
An arc that glows green thanks to doubly ionized oxygen appears near the Andromeda Galaxy in a photo obtained by amateur astronomers.
White Dwarf Survived 850-year-old Supernova
A supernova that skywatchers in the Far East observed almost 850 years ago has produced the most unusual remnant astronomers have ever found
Astronomers Discover Giant Blinking Star
A red giant star thousands of light-years away "blinked," dimming significantly for seven long years, before returning to normal.
Squid Galaxy Gets in on the Neutrino Game
Astronomers have connected dozens of neutrinos detected by the IceCube Observatory to a nearby galaxy, M77, aka the Squid Galaxy.
Lost Star Catalog of Ancient Times Comes to Light
Technology may have revealed a piece of the long-lost works of Greek astronomer Hipparchus, one of the greatest astronomers of antiquity.
Speeding Cloud Might Come from Recent, Nearby Supernova
Hypervelocity clouds, generally thought to be falling fast into the Milky Way, might have an alternative explanation that places them near us.
Lost Moon Could Solve Saturn’s Riddles
An icy moon torn apart in Saturn's gravitational field some 150 million years ago could explain why the planet's rings are so young and a host of other puzzles.
Did the Dinosaur-killing Asteroid Have a Sidekick?
The asteroid that wiped out the dinosaurs 66 million years ago might not have arrived alone.
Dusty Disk Discovered in the Twins’ Foot
A careful study of observations spanning decades has revealed that a star in Gemini is regularly eclipsed by a disk-shrouded companion.
Webb Telescope Shatters Distance Records, Challenges Astronomers
Distant galaxies in Webb images suggest we need to rethink star and galaxy evolution in the early universe.
