1) All moon visitors, so far 2) Astronauts and ETs 3) Flash Gordon and crew 4) Little green fellows 5) Male astronauts 6) Moon walkers 7) Phenomena of our time 8) Rocketeers 9) They may be encapsulated 10) Visitors from another planet Found on https://www.crosswordclues.com/clue/spacemen
1) All moon visitors, so far 2) Astronauts and ETs 3) Flash Gordon and crew 4) Little green fellows 5) Male astronauts 6) Moon walkers 7) Phenomena of our time 8) Rocketeers 9) They may be encapsulated 10) Visitors from another planet