Exoplanet Kepler-186 and the Solar System

2010s 2014 21st century astronomy celestial body compare deep space earth like planet earth like earth size exoplanet galactic center galactic core galaxy graphic habitable zone habitable illustration inhabitable kepler mission kepler 186 planetary system kepler 186 system kepler 186 kepler 186b kepler 186c kepler 186d kepler 186e kepler 186f m spectral type milky way galaxy milky way outer space planetary habitability red dwarf science space art space star system terran terrestrial