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Exoplanetary Scratchpad

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The first multiplanet circumbinary star system found. Contains a yellow and red dwarf. The inner planet has 3 times Earth's radius and a period of 49 days. This planet is thought to have a thick blanket of methane haze around it. It is the smallest known transiting circumbinary planet. The outer planet is the furthest known transiting exoplanet with a period of 303 days. It is a Uranus-sized planet in the habitable zone. The stars go around each other once every week, causing the planet to experience several percentages of difference in temperature. Assuming a 24 hour day, they would rise and set about 30 minutes after each other, and can also be seen regularly eclipsing each other. A moon around this planet could be habitable. This system challenges planetary system formation theories. Planet c, unlike other known circumbinary planets, orbits far enough out to not need to have formed out further than it is today.

Kepler-47 System Web Pages[]

Kepler-47 System In the News[]

Discovered (Aug 2012)[]

Case Study (2013)[]

Probably Didn't Form Further Out (2014)[]

See also Kepler-34 System

See Also[]