GJ 523b identified as a rare 'mega-Earth' exoplanet using NASA's TESS
Scientists have classified the exoplanet GJ 523b as a “mega-Earth”, a rocky planet with a radius of at least 2.1 Earth radii and density of at least 5.5 g/cm³. GJ 523b is about 2.55 times Earth’s radius, 23.5 Earth masse...