Kepler- 186f

kepler 186f

kepler-186f is a history-making discovery because it is the first earth-sized planet that was found in the circumstellar habitable zone of its host star. This means that water could exist on the surface of the exoplanet and since water is a key element to life that means it could inhabit alien/foreign life. its mass is 1.71 earths and the planet radius is 1.17 times that of earth. Kepler 186f has an orbital period of 129.9 days and is orbiting its host star of an orbital radius of 0.432 AU. It was discovered in 2014 using the transit detection method. It is located 579 light years away from earth.