astronaut step on the moon

50s 60s art astronaut astronomy atmosphere background black blue captain cartoon comic cosmic cosmonaut cosmos dark deep discovery door dream earth entrance environment eternity evacuation exit exploration fantasy future galactic galaxy gravity helmet hero illustration indecision journey man moon nasa nature nebula new night open orbit outer passage path people pioneer planet pop retro rocket salvation satellite science scifi shuttle sky solar space spacecraft spaceman spaceship spacesuit star stars starship step suit system technology threshold travel universe way world