NASA mission discovers second Earth-size, rocky planet within habitable zone of its star

NASA mission has discovered a second Earth-sized, rocky planet within the habitable zone of its star -- the range of distances where liquid water could occur on a planet's surface. Using data from NASA's Transiting Exoplanet Survey Satellite (TESS), the astronomers found "TOI 700 e" which is one of only a few systems with multiple, small, habitable-zone planets that we know of.