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.

Webb captured the distinct signature of water, along with evidence for clouds and haze, in the atmosphere surrounding a hot, puffy gas giant planet orbiting a distant Sun-like star.

Two newly discovered "super-Earths" are rocky worlds – and could be ideal candidates for follow-up atmospheric observations.

The detection of 30 comets in another solar system – exocomets – could shed light on the formation of our own system of planets.

An international team of astronomers confirms 60 new exoplanets, or planets orbiting other stars; a separate study finds tentative evidence of an “exomoon.”

The count of confirmed exoplanets just ticked past the 5,000 mark, representing a 30-year journey of discovery led by NASA space telescopes.