GJ1214b

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3.

The extrasolar planet GJ 1214b is a rocky planet rich in water that sits about 40 light-years away .

外太阳系行星 GJ1214b 是一颗约有 40 光年远的由岩石组成的多水行星。

wài tài yáng xì xíng xīng GJ yāo èr yāo sì b shì yī kē yuē yǒu sì shí guāng nián yuǎn de yóu yán shí zǔ chéng de duō shuǐ xíng xīng 。