Boffins claim the spooky object is unexplainable and cannot possibly be a drone or helicopter due to the altitude.
It was spotted after mountaineer and filmmaker David Breashears stitched together 477 images as part of a two-billion-pixel photograph in 2012.
The mosaic image is intended to show the mountain in all its glory and stretches from basecamp to the sky above.
But Everest has been overshadowed by the bizarre object above it after footage was uploaded to YouTube channel UFO Today.
The description reads: “When we zoom in on one of the mountains left of Mount Everest, we can see a UFO flying above the summit.
“The object resembles a flying disc of some sort and it’s clearly there since we can see its silhouette.
“Judging its height from Mount Everest it’s safe to say this object is flying way above the height where helicopters or drones would operate.
Many American’s believed this photo to prove the existence of UFO
“We don’t have any additional information on the object but it’s interesting to see it flying above one of the highest mountains in the world.”
Conspiracy theorists also note the long-standing rumours of underground bases in the Himalayas.
And last year, declassified CIA files revealed seven sightings of UFOS in the skies above Nepal and neighbouring India in 1968.