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NASA proposes submarine mission to Saturn’s moon Titan

NASA is planning to send a submarine to Saturn’s largest moon by 2040 to study Titan’s hydrocarbon oceans. Titan is the only celestial body in the solar system other than Earth that is known to host liquid lakes and seas on its surface.Titan’s atmosphere is a mix of methane, nitrogen, and argon, and its surface has liquid methane oceans and lakes. Atmospheric pressure is 50 percent higher than Earth at sea level.