to the passage below and then answer the question afterwards in the same language as the passage: Passage: On December 20, 2011, the Kepler Space Telescope team reported the discovery of a five-planet system containing three small gas giants and the first two Earth-sized extrasolar planets, Kepler-20e (the first known extrasolar planet smaller than Earth orbiting a main-sequence star) and Kepler-20f, orbiting a Sun-like star. bó tilẹ̀ jẹ́ pé àwọn pílánẹ́ẹ̀tì náà tóbi bí ayé, wọn kò dàbí ayé ní ti pé wọ́n sún mọ́ ìràwọ̀ wọn ju ayé lọ, nítorí náà wọn kò sún mọ́ àgbègbè tí ó ṣeé gbé, pẹ̀lú òkìtì òjò tí ó tó 760 °C (1,400 °F) àti 427 °C (801 °F), lẹ́sẹ̀kẹsẹ̀. àwọn pílánẹ́ẹ̀tì mìíràn tí ó tóbi bí Neptune nínú ètò náà, Kepler-20b, Kepler-20c, àti Kepler-20d, gbogbo wọn ló sún mọ́ ìràwọ̀ Kepler. Kepler-20 jẹ́ pílánẹ̀tì tí kò tóbi
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