Nearby Habitable-Zone Exoplanet Sparks Life-Hopes

Astronomers refined the mass and orbit of GJ 3378b, a 2.3‑Earth-mass exoplanet around a nearby red dwarf about 25 light-years away in Camelopardalis. With a 21-day orbit, it sits in the star’s habitable zone and could be rocky, but its atmosphere and true habitability remain uncertain because it does not transit its star. Atmosphere confirmation awaits future instruments like the Habitable Worlds Observatory (targeted for the 2040s) and JWST observations, all while red-dwarf radiation poses challenges—yet this nearby world is one of our best chances to study potentially habitable exoplanets.