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Kepler-20c
Kepler-20c is an exoplanet orbiting Kepler-20. It has a mass similar to Neptune but is slightly smaller. Despite being the third closest planet to Kepler-20, it is still close to the star, meaning that it is a Hot Neptune. Along with the other four planets in the system, Kepler-20c was announced on 20 December 2011. == Sources == http://kepler.nasa.gov/Mission/discoveries/kepler20c/
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Kepler-20c」の詳細全文を読む
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