An international team of researchers has used NASA’s James Webb Space Telescope to measure the temperature of the rocky exoplanet TRAPPIST-1 b.

The planet is rocky and almost precisely the same size as Earth, but whips around its star in only two days.

A second Earth-sized world is found in habitable zone of a star with three previously known planets.

A previously discovered "hot Jupiter" appears to be spiraling into its star, new data shows.

Two exoplanets orbiting a red dwarf star may be "water worlds." They are 218 light-years away in the constellation Lyra, and are unlike any planet found in our solar system.

Webb's firsts keep coming: Observations of the exoplanet WASP-39 b show fingerprints of atoms and molecules, as well as signs of active chemistry and clouds.

New observations show that a previously identified exoplanet, TOI-1075 b, is among the most massive super-Earths found so far.

A new study of the "super-Earth" GJ 1252 b shows that the planet likely has a very minimal atmosphere or, possibly, no atmosphere at all.

A newly discovered 'super-Earth' lies in the habitable zone around its star, and appears to be in a prime position for further atmospheric investigation.

Webb ushers in a new era of exoplanet science with the first unequivocal detection of carbon dioxide in a planetary atmosphere outside our solar system.

A "super-Earth" discovered using the TESS satellite might be a "water world," though more observations are needed.

The James Webb Space Telescope will examine the "lives" of exoplanets, from formation through maturity and eventual demise.