of or
relating to
time periods with
space travel, spaceships, spacemen, intergalactic travel, wars, conflicts, other beings, civilizations and societies, and other planets and galaxies.
Space opera is not fiction but
concerns actual incidents and things that occur and have occurred on the
track. Now, all this sounds very space operaish and that sort of thing, and I'm sorry for it, but I am not one to quibble about the
truth.
-Auditing Comm Cycles (6 Aug. 63)