NASA / SCIENCE PHOTO LIBRARY NASA / SCIENCE PHOTO LIBRARY
Discovery in orbit during mission STS-133. Backdropped by Earth's clouds, Discovery is approaching the International Space Station (ISS) during the docking operations that took place on 26 February 2011. Docking occurred at 19:14 UTC. Discovery was part of NASA's Space Shuttle program. It flew 39 missions over a period of 26 years, being retired from service in March 2011. STS-133 was its final mission, taking place from 24 February to 9 March 2011. Photographed by an ISS Expedition 26 crew member.
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