https://history.nasa.gov/printFriendly/styleguide.html officially phasing this term out the Moon http://history.nasa.gov/printFriendly/styleguide.html "Style Guide for NASA History Authors and Editors" their own styleguide on human spaceflight the official NASA style guide http://history.nasa.gov/printFriendly/styleguide.html Style Guide for NASA History Authors and Editors "Style Guide for NASA History Authors and Editors" "Style Guide for NASA History Authors and Editors"