JWST Sheds New Light on Mysterious ‘Sub-Neptune’ Worlds

This artist’s concept of hot sub-Neptune exoplanet TOI-421 b. Illustration: NASA, ESA, CSA, Dani Player (STScI)

In a groundbreaking study that could transform our understanding of planetary systems beyond our own, NASA’s James Webb Space Telescope has offered an unprecedented glimpse into the atmosphere of a curious and poorly understood class of exoplanets known as sub-Neptunes. Sub-Neptunes — planets larger than Earth but smaller than Neptune — don’t exist in our … Read more

K2-18b: Can We Get There Before We’re Gone?

Artist Concept-Exoplanet K2-18 b.

In the vast tapestry of the cosmos, few discoveries have ignited as much intrigue as K2-18b. Located approximately 124 light-years away in the constellation Leo, this exoplanet has recently captured the attention of scientists and dreamers alike. Using the James Webb Space Telescope (JWST), researchers have detected atmospheric signatures of methane, carbon dioxide, and a … Read more

JWST Detects Water Vapor on the Smallest Exoplanet Yet

GJ 9827 d: The Smallest Exoplanet Discovered with Water Vapor GJ 9827 d, an exoplanet situated approximately 98 light-years away, has captured the attention of astronomers as the smallest exoplanet identified to date that possesses water vapor in its atmosphere. With a diameter nearly twice that of Earth, questions arise regarding its composition—could it closely … Read more