Kepler Telescope's Final Planetary Discoveries Revealed.

Astronomers, with the help of citizen scientists, have discovered what may be the last three planets that NASA's Kepler Space Telescope saw before it was retired. The two validated planets are K2-416 b and K2-417 b, both "hot mini-Neptunes" located about 400 light years from Earth. The third is a planet candidate, EPIC 246251988 b, which is almost four times the size of Earth and orbits its star in around 10 days, located 1,200 light years from Earth. Kepler discovered over 2,500 exoplanets during its nine and a half year mission, contributing to the confirmation of over 5,000 planets beyond our solar system.