This "movie" is actually the original series "Uchû senkan Yamato" (1974-1975) edited into 2+ hours and shown theatrically. It should also be noted that it was this movie that made "Yamato" extremely popular in Japan (the original TV series didn't do so well in the ratings) and its success led (so far) to two other TV shows, four more movies, and a direct-to-video mini-series.