NASA's Transiting Exoplanet Survey Satellite, known as TESS, has spotted "hot Earth" and "super-Earth" planets in solar systems 49 and 60 light-years away, marking its first discovery since April launch. TESS is designed to build on the work of its predecessor, Kepler space telescope, which discovered over 2,500 confirmed exoplanets in 20 years and is now running out of fuel.