Global mosaic of 102 Viking 1 Orbiter images of Mars taken on orbit 1,334, on 22 February 1980. The images are projected into point perspective, representing what a viewer would see from a spacecraft at an altitude of 2,500 km. At the centre is Valles Marineris, over 3000 km long and up to 8 km deep. At upper right are the channels running up (north) from the central and eastern portions of Valles Marineris to the dark area, Acidalic Planitia. At left are the three Tharsis volcanoes and to the south is ancient, heavily impacted terrain.
© National Aeronautics & Space Administration / Science & Society