Astronomers are closing in on what looks like a rare prize: a world almost the size of Earth, circling a Sun-like star at a distance that gives it a familiar, year-long orbit. The candidate, known as ...
NASA’s Transiting Exoplanet Survey Satellite, or TESS, first flagged the object as a candidate. TESS watches for tiny dips in a star’s brightness, signals that can indicate an orbiting planet, though ...