Kepler-18 System

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Exoplanetary Scratchpad

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An unusual triple planet system around a very sun-like star discovered by Kepler. It contains a super-Earth and two outer Hot Neptunes which are in 1:2 resonance with each other. The outer two planets were verified via their gravitational interaction with each other, while the inner planet was only validated by ruling out most of the other things it could possibly be.

Kepler 18 System Web Pages

Kepler 18 System In the News

Triple Planet System Found (Oct 2011)

Year in Review (2011)

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