月球
泰坦
Saturn's largest moon, the only moon with a thick atmosphere and with lakes of liquid methane.
NASA, ESA, CSA, STScI; J. DePasquale, A. Koekemoer, A. Pagan (STScI) (CC BY 4.0)
A moon with rain, rivers and lakes, all made of methane instead of water.
Titan has a nitrogen-rich atmosphere denser than Earth’s. On its surface, at about −180 °C, methane and ethane play the role that water plays on Earth: they form clouds, rain, rivers and lakes.
ESA’s Huygens probe landed on Titan in 2005. NASA’s Dragonfly rotorcraft is planned to explore it in the 2030s.
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