Valles Marineris

[ val-uhs-mar-uh-nair-is ]

noun

, Astronomy.

1. a canyon on Mars, 3,100 miles (5,000 km) in length, named after the Mariner spacecraft.

Example Sentences

It also hasn’t been exposed in a half-dozen other locations—impact craters and massive trenches, like Valles Marineris, the Grand Canyon of Mars.

From Nautilus

Numbers alone are one thing, but breathtaking close-up images of Valles Marineris recently released by the University of Arizona put the stats into perspective.

From Popular-Science

It’s tiny details like these that will help us understand how Valles Marineris came to be, as well as the planet’s climate history as a whole.

From Popular-Science