Sojourner rover
NASA’s 25-pound Sojourner rover, in addition to being the most adorable robot ever sent to space, is the first wheeled vehicle to rove around the surface of another planet. As a key component of the 1997 Mars Pathfinder Mission, Sojourner spent 83 days exploring the Red Planet, taking photos and gathering chemical and atmospheric data. It’s still out there on the plains of Chryse Planitia, though likely covered in a thick layer of red Martian dust.
