Space Shuttle Discovery, Unforgettable Element for Space Explorations  

TEHRAN (ANA)- Space Shuttle Discovery (Orbiter Vehicle Designation: OV-103) is a retired American Space Shuttle orbiter. The spaceplane was one of the orbiters from NASA's Space Shuttle program and the third of five fully operational orbiters. Its first mission, STS-41-D, flew from August 30 to September 5, 1984. Discovery was retired after completing its final mission, STS-133 on March 9, 2011.