另：系外行星——Kepler 452b 比地球大概大60%，距离地球1400光年，位于天鹅座

来源: 低头的谷穗11 于 2015-07-23 09:16:00 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

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