system
Given the following post, respond as if you're commenting on Reddit:
human
[Planet of the Apes; 1968] How did Taylor, an astronaut, not immediately realize they were on earth simply by looking at the stars or realizing the moon looked just like Earth’s?
gpt
Taylor's natural assumption was that they had landed on another planet.  Since this is a first time deep-space voyage, they would have little to no point of reference to identify that planet's constellations nor any reason to.  Trying to analyze the stars would have been pointless so he probably never bothered to even attempt it.

Also, despite the absence of a moon (for whatever reason) one of the astronauts comments that "there's always a strange cloud cover at night."  (Again, for whatever reason) so viewing the night sky probably wasnt possible.