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?
Two Worlds Have Ended in a Planetary Collision — and a New One Has Begun
A star's sudden brightening and, two years later, its sudden dimming point to a cataclysmic collision between two large worlds.
How Did Two Hot and Super-dense Neptunes Form?
Astronomers have discovered two Neptune-size planets that are denser than rock and in searingly close orbits to their star. How did these odd worlds form?
Hubble, Webb Data Hint at Ocean Worlds
Data coming from the Webb and Hubble space telescopes suggests two exoplanets might be water worlds. But the evidence isn’t yet definitive.
Exoplanet News: No Air on Venus Twin, Young Jupiter Discovery
Astronomers have discovered Jupiter's younger sibling in a system 88 light-years away. Meanwhile, only 40 light-years away, a Venus-size world turns out to be airless (or nearly so).
Where to Look for Life: Homing in on the Habitable Zone
Scientists are refining the definition of the habitable zone in an effort to aid future efforts at finding life.
Giant Planets Around Small Stars
Leading theories say giant planets shouldn’t be able to form around very low-mass stars. But a new study finds that, nevertheless, they do.
Exoplanet TRAPPIST-1b Has No Atmosphere
The TRAPPIST exoplanets offer the James Webb Space Telescope some of the best opportunities to observe rocky worlds. But Webb images show the innermost planet b has no atmosphere.
New Planets in the Neighborhood
A planet-hunting consortium is marking five successful years by releasing data on more than 50 worlds.
JWST Investigates an Exoplanet "Corgi"
The James Webb Space Telescope has found the tiny tail of a close-in exoplanet that's losing its atmosphere.
Webb Telescope Confirms Earth-size Exoplanet, Tries to Sniff Its Air
The James Webb Space Telescope has confirmed its first exoplanet, a rocky Earth-size planet, and attempted to take the measure of its atmosphere.
Webb Telescope Surveys a Hot Saturn
A collection of five research studies delve into the atmosphere of exoplanet WASP-39b as astronomers seek to better understand the chemistry of a world beyond the solar system.
Ancient White Dwarf Hosts Planetary Graveyard
Scientists have discovered one of the oldest planetary graveyards in the Milky Way: a cool white dwarf "polluted" with rocky debris.
Shields Up: Red Dwarf Worlds Might Adapt to Hostile Systems
Worlds around red dwarf stars might build an ozone "shield" in response to stellar flares.
Breadcrumbs Lead to Baby Planet
New radio images reveal evidence for a planet forming around the Sun-like star LkCa 15.
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.
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.
What the James Webb Space Telescope's First Year Will Reveal
The James Webb Space Telescope's first year of observations promises to reveal exoplanet atmospheres and surfaces, infant galaxies, and maybe even the first black holes.
How to Image an Exoplanet with Just a Few Pixels
Using Earth as an example, astronomers are testing a new technique that could image rocky exoplanets without resolving them.
First Look at an Unusual Exoplanet’s Atmosphere
AAS Nova reports on a "super-puff" exoplanet that's nearly 15 times less dense than Jupiter.
