Extraterrestrial cliffs

rupes on Miranda

[[File:Rupes Recta (LROC287 - recta thumb2).png|thumb|Rupes Recta is a well-known linear rille that extends over 100 km in length. Portion of LROC WAC monochrome mosaic, illumination is from the left, and asterisk notes location of LROC NAC (below) [NASA/GSFC/Arizona State University].]] In planetary geology, rupes (, plural: ) are escarpments on planets other than Earth.

rupes on Titania