Astronomy:Arnus Vallis

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Arnus Vallis
Arnus Vallis Layers by Mars Reconnaissance Orbiter's HiRISE.JPG
Arnus Vallis Layers, as seen by HiRISE. Scale bar is 500 meters long.
CoordinatesCoordinates: 14°06′N 289°30′W / 14.1°N 289.5°W / 14.1; -289.5

Arnus Vallis is an ancient river valley in the Syrtis Major quadrangle of Mars, located at 14.1° north latitude and 289.5° west longitude. It is 280 km long and was named after the classical and present day Arno River in Tuscany, Italy (previously named Arena Rupes).[1]


  1. "Planetary Names: Welcome". Retrieved 2022-03-20.