News > New Earth-size planet found in habitable zone by NASA's TESS mission

New Earth-size planet found in habitable zone by NASA's TESS mission

With the identification of a second Earth-sized, rocky planet within a star's habitable zone, NASA's Transiting Exoplanet Survey Satellite (TESS) mission has made a ground-breaking discovery. It is one of just a handful of known systems with several, tiny planets in the habitable zone. The term "habitable zone" describes the range of distances from a star where liquid surface water might have existed at some point in a planet's past.