Helium detected escaping the atmosphere of a nearby habitable-zone rocky exoplanet

Astronomers report the detection of helium escaping from the atmosphere of a nearby rocky exoplanet that orbits within its star’s habitable zone, per a Science paper (DOI 10.1126/science.aea9708). Atmospheric escape of a light element like helium is significant because it bears directly on whether a small rocky world can retain an atmosphere over long timescales — a key input to habitability assessments. NOTE: Only the headline was supplied to me; the article body, including the planet’s identity, the escape rate, the observational method, and the authors’ interpretation, was not provided, so those details are deliberately omitted rather than guessed.