bild

This undated artist's concept released 26 October, 2000 shows NASA's Mars rover program past, present and future. The rover on the left is Sojourner, which landed as part of the Mars Pathfinder mission in 1997. The image in the middle is the Mars Exploration Rover that is planned for launch in 2003 and the image on the right is a proposed concept of a future mobile science laboratory that is under consideration for a launch in 2007. (KEYSTONE/EPA PHOTO/NASA)