SUNSET: 
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.
A Closer Look at the Worlds of TRAPPIST-1
Two new studies of the seven planets orbiting TRAPPIST-1 shed light on how these worlds formed and what they look like now.
Planet Orbits Quiet Star 11 Light-years Away
Astronomers have discovered a potentially rocky planet around a red dwarf star just 11 light-years away.
New Age Estimate for TRAPPIST-1
A new study suggests that the seven-planet dwarf star could be much older than the Sun.
Mini-Flares Might Threaten Life Around Red Dwarf Stars
A new study of data archived from the Galaxy Evolution Explorer (GALEX) spacecraft is revealing just how hard life might be on planets like those in the TRAPPIST-1 system.
Seventh TRAPPIST-1 Planet Confirmed
Astronomers have confirmed the existence of the seventh planet around the ultracool dwarf star TRAPPIST-1.
Seven-Planet Star Hides Age, Might Be Deadly
The star with seven exoplanets puts out enough high-energy radiation to tear away the inner planets’ atmospheres in a few billion years.
Seven Earth-Sized Planets Found Orbiting Dim Star
Astronomers have found seven Earth-sized planets around a cool red dwarf, all of which have the potential for liquid surface water.
Earth-size Planets Around Nearby Dwarf Star
Astronomers just discovered three planets, two of which are roughly the size of Earth, orbiting a dim nearby dwarf star. Their proximity makes their atmospheres ripe for observing.
