The Space Shuttle Discovery completed its final mission in March 2011, landing safely at the Kennedy Space Center to conclude its distinguished career spanning nearly 30 years in space. Discovery was the most traveled space shuttle, having orbited the Earth 5,830 times and traveled 148 million miles during its 39 missions. With Discovery's retirement, the Space Shuttle Program came to an end, marking the end of an era of American space exploration and pioneering research conducted in low Earth orbit.