In the YouTube clip, the camera follows the objects as they shoot along together, before zooming in on to one of them for a close up view.

Jeffrey Boyd Jr, who posted the video, entitled the startling clip "NASA sat two UFOs! Close ups, Wtf is this?"

In a blurb for the video he said: "NASA sat feed catches two objects, UFOs? "Cruising from North Pole! Closeup! Great resolution, very clear. Has windows? What is this?"

Some YouTube viewers were stunned.

One posted yesterday: "If this is legit, it's the best footage out there so far. Impressive."