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The rocky exoplanet orbits a red dwarf star 500 light-years from Earth. The figure is taken from NASA Science, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.

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Kepler-186f was the first Earth-sized planet found in a habitable zone

The rocky exoplanet orbits a red dwarf star 500 light-years from Earth

Discovered in 2014 by NASA's Kepler Space Telescope, Kepler-186f was the first validated exoplanet with a radius similar to Earth found within its star's circumstellar habitable zone. Orbiting a red dwarf star 500 light-years away, it receives roughly one third of the stellar energy Earth receives from the Sun.

First Potentially Habitable Earth-Sized Planet Confirmed By Gemini And Keck Observatories (gemini1403a) — NASA Ames/SETI Institute/JPL-CalTech. · CC BY 4.0 · licence · source

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NASA Science

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Tags: kepler-186f, exoplanet, habitable zone

Kepler-186f was the first Earth-sized planet found in a habitable zone: the short answers

Where does this come from, and can I check it?: The rocky exoplanet orbits a red dwarf star 500 light-years from Earth. The figure is taken from NASA Science, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.
Is this really a space fact?: Yes. It sits on the Space shelf, one of 1,090 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.
What else can I read about it?: The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.