Close banner

Support Outside Online

Love Outside?

Help fund our award-winning journalism with a contribution today.

Contribute to Outside

River System Found on Saturn Moon

First image of outerspace river system

Ready to huck the lunar gnar? The European Space Agency (ESA) has unveiled the first-ever picture of an active river system on another world. The photo was taken by the Cassini probe over Saturn’s largest moon, Titan, and shows a river system over 400km long stretching from its headwaters to a large sea. Radar imaging shows a smooth, consistent surface in the river valley, which scientists say indicates the presence of liquid, most likely methane or ethane. Liquid ethane was confirmed on the moon's surface in 2008 and Titan remains the only other known world with stable liquid on its surface.

"This radar-imaged river by Cassini provides another fantastic snapshot of a world in motion," said ESA Cassini Project scientist Nicolas Altobelli. The Cassini mission is a cooperative project of NASA, ESA, and ASI, the Italian space agency.


Support Outside Online

Our mission to inspire readers to get outside has never been more critical. In recent years, Outside Online has reported on groundbreaking research linking time in nature to improved mental and physical health, and we’ve kept you informed about the unprecedented threats to America’s public lands. Our rigorous coverage helps spark important debates about wellness and travel and adventure, and it provides readers an accessible gateway to new outdoor passions. Time outside is essential—and we can help you make the most of it. Making a financial contribution to Outside Online only takes a few minutes and will ensure we can continue supplying the trailblazing, informative journalism that readers like you depend on. We hope you’ll support us. Thank you.

Contribute to Outside
Filed To: News