The puzzling rivers of Titan

Cassini radar image showing some of Titan’s river networks draining into lakes in the north polar region.
Credit: NASA / JPL / USGS

Just like Earth, Saturn’s moon Titan has rivers, lots of them, as well as lakes and seas. Appearance-wise, they look just like their earthly counterparts, but there is one big difference – they are composed of liquid methane instead of water. Titan is far too cold for liquid water on its surface, although there is probably a subsurface ocean.

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Paul Scott Anderson is a freelance space writer with a life-long passion for space exploration and astronomy. He started his blog The Meridiani Journal in 2005, which is a chronicle of planetary exploration. He also publishes The Exoplanet Report e-paper. In 2011, he started writing about space on a freelance basis, and now also currently write for AmericaSpace and He has also written for Universe Today and SpaceFlight Insider, has been published in The Mars Quarterly and has done supplementary writing for the well-known iOS app Exoplanet for iPhone and iPad.