Moon explorations have been one of the biggest space projects in the history science. As humans were busy closely observing the moon, archive photos of the Apollo missions suggest that aliens may have been observing humans exploring the moon.

The Apollo mission launched by the U.S. National Aeronautics and Space Administration (NASA) saw the first humans to ever land on the surface of the moon in 1969. However, several manned Apollo missions followed until 1972.

Many people across the world have reported sightings of unidentified flying objects or UFOs. However, while going through the archival images of Apollo 15 mission, a UFO researcher found a UFO hovering over the lunar horizon.

The latest UFO news comes from a YouTube video that was uploaded by Streetcap1. The original image that contains the so-called UFO was taken on Moon's surface during the 67 hours between July 30 and Aug. 2, 1971.

Some UFO enthusiasts believe that the object highlighted in the image is actually a UFO observing the moon landings by human, while some others believe that it could be something else such as dust particle, camera error, space debris or more.

"It could be anything, a scratch on this particular camera lens, a piece of dust flying up, since there is very low gravity, things tend to move around a bit up there. It could even be a blocked out, bad picture of earth from the moon. Nothing about this still picture proves that it is a UFO, since whatever it is, is not flying, its stationary since it is only a picture. My best guess, it's a bad picture, and that's a spot left from bad developing," per a comment on the YouTube video.

YouTube user Streetcap1 also highlighted that even though the craft has not been identified it does not mean the object is an alien craft.

The Apollo 15 mission was not the first manned mission to Moon. However, NASA termed Apollo 15 as "J missions," long stays on the Moon. It was also the first Apollo mission that used Roving Vehicle. NASA also called Apollo 15 as one of the most successful manned missions to the space ever achieved.

What do you think of the object: UFO, space debris, camera error or something else?

Check out the video showing the unidentified craft.

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