A great shot of NASA's space shuttle Discovery. This particular shot was taken for mission STS-95 on 29 October 1998. Discovery was the third of the five operational shuttles, or orbiters, to be built. Between its first mission (STS-41-D on 30 August 1984) to its final mission (STS-133 on 24 February 2011) it was launched 39 times, the most of all five shuttles. It was the first of the three operational shuttles to be retired and is on display at the Steven F. Udvar-Hazy Center of the Smithsonian National Air and Space Museum. Over the course of its life, Discovery flew 238 million kilometers; 5830 orbits; and spent 365 days in orbit over 27 years. In 1985 it was launched four times.