....or a dead pixel ?
NASA camera images from Mars of a strange white light dancing across the horizon have UFO enthusiasts buzzing that alien ships are watching our progress.
The images were transmitted back to Earth from NASA's Curiosity rover, which landed on the red planet on August 5.
The images reveal a white light in the horizon as well as four blobs hovering in the sky.
Stephen Hannard, of Alien Disclosure Group UK, posted the clip online after putting the images through a series of filters.
NASA has not commented on any of the sightings yet but video experts say they are just blemishes.
Video analyst Marc Dantonio, who has studied UFO videos before, told the Huffington Post the images were one-pixel sized image anomalies.
"All CCD [cameras] have them and in a bland atmosphere like that at Mars, they would be very obvious as opposed to an active atmosphere like Earth, where they could end up hidden for a long time before anyone noticed them," he said.
The Curiosity rover is yet to make its first test drive of the Martian landscape.
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