Artist's concept of the Valles Marineris canyons on Mars. - stock illustration

Artist's concept showing how the Valles Marineris canyons may appear shortly after sunrise from an altitude of 35 miles. The view is from a position over the center of the trough system looking east. In the right foreground is the Ius Chasma, and above it toward the Sun is the Melas Chasma, and on the left nearer to the horizon is the West Candor Chasma. The horizon itself spans about 300 miles.