The bizarre claim is based on footage taken from the 1972 Apollo 17 moon mission.
In it, astronauts Eugene Cernan and Harrison Schmitt explore The Moon’s surface and eventually turn to the camera.
The Sun’s reflection is visible in both their helmets – but one “researcher” claims all is not as it seems.
She says: “Here is a screenshot from footage that NASA provided for us. Without me even adjusting anything, you can clearly see that The Sun is a spotlight.
“This is not the real Sun, this is a spotlight in a movie studio.
“You can clearly see it is a light supported in some type of metal housing around the spotlight.
“These two are not walking on the moon, if you have a rally keen eye you can see there is even a person standing right there.
“You can see his legs and a dark jacket, it’s almost like he’s standing with his hands in his pockets.”
“This is not the real Sun, this is a spotlight in a movie studio”
Next week will mark the 50th anniversary of the Apollo 11 1969 moon landing mission.
A raft of conspiracy theories have also emerged around it and dogged NASA ever since.
Some have claimed that the astronauts involved were “bumped off” to hide top-secret information on the NASA programmes – despite having no proof.
One incident often drawn on is the deaths of astronauts Virgil Grissom, Ed White, and Roger Chaffee in 1967.
They were killed in a devastating fire on the Apollo launchpad during a simulation.
The Command Module Interior caught fire and each of them was asphyxiated – with the fire’s source never determined.
However, there was no indication of foul play.