Video footage shows the bizarre anomaly that was spotted during NASA’s live feed from space.
It shows a strange grey object appearing to float above Earth.
The article appears to be shaped like an aircraft and moving south, though some believe it could be stationary on top of a mountain or the Luobubozhen facility in China.
But the person behind the camera even speculates a figure can be made out inside the UFO.
“The craft has 90 degree sharp angles and looks to be intelligently designed,” they said.
“I think it is some sort of craft, but cannot work out whether it is on the ground, or flying.
“If it’s on the ground its huge.”
According to the person who captured it, who wishes to remain anonymous, the clip shows: “A craft with a doorway and a being inside.”
They said: “At first I thought it was a cloud, but now I’m convinced its much more.”
The footage was captured in September 2017, but only shared on October 1 this year.
It was shared on YouTube channel MrMBB333 yesterday and has already racked up more than 55,000 hits.
“No chance that is on the ground – looks like it’s in the air,” one viewer claimed.
Another added: “You can see a trail behind it.”
And a third suggested: “NASA is lying to us.”