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Kepler-47c

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description Kepler-47c Overview

Kepler-47c is a giant exoplanet orbiting in the Kepler-47 circumbinary system, which was announced in 2012. It holds the distinction of being the first circumbinary planet discovered orbiting within the habitable zone of its two host stars. Despite its placement in the habitable zone, the planet itself is a gas giant and is not considered capable of supporting life. However, its presence suggests that potentially habitable exomoons could exist in stable orbits around it.

help Kepler-47c FAQ

What makes Kepler-47c scientifically significant among exoplanets?

Announced by NASA in 2012, Kepler-47c was the first circumbinary planet found orbiting within the habitable zone of a two-star system. It circles both stars of the Kepler-47 binary pair, proving that planets can maintain stable orbits in habitable zones even in the dynamically complex environment around two stars.

Could Kepler-47c actually support life despite being in the habitable zone?

Kepler-47c is believed to be a gas giant rather than a rocky planet, meaning it likely has no solid surface on which life as we know it could develop. However, if it possesses large rocky moons—as yet undetected—those moons could theoretically host liquid water and more Earth-like conditions.

What types of stars does Kepler-47c orbit?

The Kepler-47 system consists of a Sun-like G-type primary star and a smaller, cooler M-type red dwarf companion. The two stars orbit each other every approximately 7.45 days, creating a dynamically complex environment for the planets that circle them both.

How long does Kepler-47c take to complete one orbit around its two stars?

Kepler-47c has an orbital period of approximately 303 days, making its year slightly shorter than Earth's. This is significantly longer than the inner planet Kepler-47b, which completes an orbit in roughly 50 days.

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