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?
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 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.
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's Exoplanet Data Are Almost Too Good
A new study urges caution in interpreting the chemical fingerprints that Webb is collecting of alien worlds.
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.
Hot and Cold: Jupiters Reveal Formation and Chemistry of Exotic Worlds
At the extremes: A hot Jupiter reveals extreme chemistry on a sizzling world, and a cold Jupiter sheds light on giant planet formation.
Astronomers Watch the Making of a Super-Earth
Gaseous mini-Neptunes may become rocky super-Earths when they lose their atmospheres. Now, astronomers have caught that process in action.
Milestone: Astronomers Discover Water Vapor on a Super-Earth
Two independent teams of astronomers have discovered the signature of water vapor in the atmosphere of super-Earth K2-18b.
60-Second Astro News: Helium Exoplanets and a Supernova Surprise
This week in astronomy news: Inflated helium atmospheres surround two exoplanets, and the Kepler Space Telescope captures the moments around a supernova that hint at a companion star triggering the explosion.
An Atmosphere of Heavy Metals
Researchers have found strong evidence of titanium oxide in the atmosphere of a hot giant planet, adding new insights to the complex motions of these planets’ extreme atmospheres.
Do Atmospheres Spin Worlds to Habitability?
The best place to look for nearby Earth-size planets are around the smallest, coolest stars. New research shows that any exoplanets tightly circling their stars might have a better chance of being habitable than previously thought.
Titan Sheds Light on Alien Atmospheres
Saturn’s largest moon Titan played a cameo as an exoplanet, allowing astronomers to better understand how a thick layer of haze or clouds might affect their observations of more distant alien worlds.
