On December 20, 2011, kooxda Kepler Space Telescope ayaa sheegay in la ogaaday nidaam shan-planet oo ay ku jiraan saddex gaas oo yar yar iyo labada ugu horeysay ee Earth-size meerayaasha, Kepler-20e (meerayaasha ugu horeysay ee la ogaado ee ka yar Earth orbiting xiddiga ugu weyn ee taxanaha) iyo Kepler-20f, orbiting xiddig Sun-sida. Inkasta oo meerayaasha yihiin Earth-size, iyagu ma yihiin Earth-sida marka la eego in ay yihiin wax badan u dhow in ay xiddiga ay ka badan Earth, oo sidaas daraaddeed ma yihiin meel u dhow aagga la degaan karo, iyadoo la filayo heerkulka dusha sare ee 760 ° C (1,400 ° F) iyo 427 ° C (801 ° F), siday u kala horreeyaan. Saddexda meerayaasha kale ee Neptune-size ee nidaamka, Kepler-20b, Kepler-20c, iyo Kepler-20d, oo dhan ku dhow xiddiga orbiting. Kepler-20 waa exoplanet non-transiting la mid ah Earth by Kepler Space Telescope.
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