A daring proposal to try to put a "boat" down on a sea of Saturn's moon Titan is about to be submitted to Nasa.
The scientific team behind the idea is targeting Ligeia Mare, a vast body of liquid methane sited in the high north of Saturn's largest moon.
The concept will be suggested to the US space agency for one of its future mission opportunities that will test a novel power system.
It would be the first exploration of a planetary sea beyond Earth.
"It is something that would really capture the imagination," said Dr Ellen Stofan, from Proxemy Research, who leads the study team.
"The story of human exploration on Earth has been one of navigation and seafaring, and the idea that we could explore for the first time an extraterrestrial sea I think would be mind-blowing for most people," she told BBC News.
Dr Stofan, who is also an honorary professor at University College London, has been describing her group's idea here at the American Geophysical Union's (AGU) Fall Meeting, the world's largest annual gathering of Earth scientists.
True extraterrestrial lunanautical exploration. 
