NASA could have been caught out "faking" the lunar landings amid claims a "stage hand" can be seen photographed in the reflection of an astronaut's visor who was supposedly on the moon.
A conspiracy theory video uploaded to YouTube suggests a human figure not wearing a space suit has been captured on camera during the 1972 Apollo 17 landing.
Thousands of people have viewed the video uploaded by channel Streetcap1, which is entitled "Does Astronaut's visor reflection show a stagehand on the Apollo fake Moon set?"
The 48th anniversary of Neil Armstrong's first steps on the lunar surface took place in July, but many conspiracy theorists across the globe remain convinced it was the biggest cover up of all time.
Moon hoax conspiracy theorists say a desperate President John F Kennedy, who wanted to beat the Russians in the space race to the moon, ordered the production of a series of films in top-secret studios to make it look like NASA astronauts made it to the lunar surface.
At the heart of the theory are claims that the radioactive Van Allen belt around Earth would have been lethal to fly through.
The video narrator said: "I came across this. I have no idea if it's been discovered before or uploaded before.
"It is from a Moon photograph. It is a reflection from one of the astronaut's face visor, so I thought it looked a bit strange.
"I took a picture of it using my software. What we appear to have here is a figure of a human not wearing a space suit, circa early 70s, it is an Apollo 17 photograph."
He said he had learned there had been some dispute about the authenticity of the pictures in 2009, but that he had not found the particular picture discussed before or through Google.
He added: "You can see some sort of… it looks like a man back in the early 1970s, long hair, you know.
"He is wearing some sort of, I don't know, waistcoat type thing… one leg there, with one shoe, another leg and a shadow of that figure presumably.
"I am going to keep looking through the photographs to see if I can find any other examples.
"There has ben a lot of debate about whether these photos were faked."
He said that until seeing the picture he had believed that NASA did make it to the Moon.
He added: "I sort of think we did make it to the Moon, but this is starting to make me think if we did because where is this guy's space suit?"
Nasa does not comment on specific moon hoax claims, but has previously vehemently denied any of the Apollo missions were faked, and insists it has made it to the moon.
Several conspiracy theory sceptics have debunked previous pictures put forward as proof the lunar landings were faked.
Some people who viewed the video were convinced it was proof of a lunar hoax.
Kati O'Brien posted on YouTube: "Pretty earth-shaking for a believer in the landing."
However, many people del the figure in the reflection looked like it was wearing a space suit, and was, therefore, just another astronaut.
Clint Steel posted on YouTube: "Looks like another astronaut."
Lee D said: "reflection looks to be astronaut."
Express.co.uk sent the image to debunker Scot Brando, who runs website ufoofinterest.org.
He also believed it was someone in a spacesuit.
He said: "Why not another astronaut?"