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neidentifikovani leteći objekat (NLO)
航空航天; 太空飞行
UFOs are unidentified aircraft which are attributed to alien space flight. One supposed UFO halted air traffic at Hangzhou Airport, China, on July 7. The appearance is being ...
svemirski šatl
航空航天; 太空飞行
A reusable spacecraft with wings developed by the U.S. National Aeronautics and Space Administration (NASA) for human spaceflight missions. The first test flight took place in ...
