Kepler-186f is a candidate Earth-sized exoplanet orbiting within the habitable zone of the red dwarf star Kepler-186, the outermost of five planets discovered around the star by NASA's Kepler space te
Artist's depiction of Kepler-186f (foreground) as a rocky Earth-like planet in the habitable zone, with the Kepler-186 system visible in the background (bottom left). The actual appearance and composition of the exoplanet is not currently known.
Size comparison of Kepler-186f (artist's impression) with Earth along with their projected habitable zones
NASA Exoplanet Exploration Program "travel poster" for Kepler-186f
In astronomy and astrobiology, the habitable zone, also known as the circumstellar habitable zone, or as the Goldilocks zone, is the range of orbits around a star within which a planetary surface coul
Kepler-186f
…Kepler-186f (also known by its Kepler object of interest designation KOI-571.05) is a candidate Earth-sized exoplanet orbiting within the habitable zone of the red dwarf star Kepler-186, the outermost of five planets discovered around the star by NASA's Kepler space telescope. It is located about 580…
Edward Walter Maunder, British astronomer, who introduced the concept of habitable zones
Earth's hydrosphere. Water covers 71% of Earth's surface, with the global ocean accounting for 97.3% of the water distribution on Earth.
Natural shielding against space weather, such as the magnetosphere depicted in this artistic rendition, may be required for planets to sustain surface water for prolonged periods.
The habitable zone of Gliese 581 compared with the Solar System's habitable zone