Kepler-138b Is Now The Lightest Exoplanet Ever Discovered
For the first time ever, astronomers have measured the size and mass of an exoplanet smaller than Earth. A team of astronomers from Penn State, NASA Ames, the University of Chicago, and the SETI Institute have measured the mass of a Mars-sized exoplanet located 200 light-years away. That’s astonishing, particularly considering that this planet, called…
