Planet Smaller than Earth Located Over 200 Light Years Away

Space





Photo credit:

Artist's rendition of the Kepler-138 system. Danielle Futselaar/SETI Institute

We think that most of the exoplanets out there in the universe are likely to be smaller than Earth. However, existing data doesn't support this. Since it's quite difficult to see small planets in the infinity of space, most exoplanets that we've so far observed are larger than Earth.