nasaspaceflight.com
NASASpaceFlight is an educational resource for documentaries, courses, books, reference material, or self-learning.
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NSF - NASASpaceflight.com is an account for news, videos and a community aimed at spaceflight enthusiasts, active since 2005. It is described as the official account of NSF and states that NSF is not affiliated with NASA, whose initials are used with permission.