1997年7月4日：旅居者号抵达红色星球
Hitching a ride on the Mars Pathfinder mission, the Sojourner rover arrived at the Red Planet on July 4, 1997. The mission was designed to demonstrate a low-cost method for delivering a set of science instruments to Mars, and served as the foundation for the Mars rovers of today. Pathfinder landed the rover using an air bag landing system and innovative peta...