Nasa Technical Reports Server

Search the Nasa Technical Reports Server for publicly accessible citations and full-text documents from Nasa and its predecessor, the National Advisory Committee for Aeronautics. The NTRS also includes images and movies from the Nasa Image Exchange. 

While astrophysics and planetary science research preprints often get posted to arXiv and other open literature databases, the NTRS is one of the few places to find the engineering research that makes space missions happen.

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