Kepler-186f

Kepler-186f is an exoplanet orbiting the red dwarf Kepler-186, about 580 light-years (180 parsecs) from Earth It was the first planet with a radius similar to Earth's to be discovered in the habitable zone of another star. NASA's Kepler space telescope detected it using the transit method, along with four additional planets orbiting much closer to the star (all modestly larger than Earth).
== Habitability ==
Kepler-186f's location within the habitable zone does not ensure it is habitable; this is also dependent on its atmospheric characteristics, which are unknown. However, Kepler-186f is too distant for its atmosphere to be analyzed by existing telescopes (e.g., NESSI) or next-generation instruments such as the James Webb Space Telescope. A simple climate model – in which the planet's inventory of volatiles is restricted to nitrogen, carbon dioxide and water, and clouds are not accounted for – suggests that the planet's surface temperature would be above 273 K (0 °C; 32 °F) if at least 0.5 to 5 bars of CO2 is present in its atmosphere, for assumed N2 partial pressures ranging from 10 bar to zero, respectively,
One review essay in 2015 concluded that Kepler-186f, along with the exoplanets Kepler-442b and Kepler-62f, were likely the best candidates for being potentially habitable planets.# Paul Gilster, Andrew LePage (30 January 2015). "A Review of the Best Habitable Planet Candidates". Centauri Dreams, Tau Zero Foundation. Retrieved 24 July 2015.In June 2018, studies suggest that Kepler-186f may have seasons and a climate similar to those on Earth.# Mack, Eric (29 June 2018). "Two Earth-like exoplanets (Kepler 186f and Kepler 62f) now even better spots to look for life – Two of the earliest Earth-ish exoplanet finds are now more exciting targets in the search for habitable worlds beyond this rock". CNET. Retrieved 29 June 2018.
== References ==
Category:Exoplanets
Category:Terrestrial planets