A Nasa astronaut aboard the International Space Station caused a bit of a stir recently when he claimed to have seen an unidentified object floating outside the craft 220 miles above Earth.
Astronaut Chris Cassidy radioed Mission Control to report the object - just to be sure.
But there was
an explanation. Watch the video to find out what it was...
This video appears to show UFOs moving across the surface of the moon, slowing down and changing directions.
This video shows what looks like a group of UFOs approaching the moon on April 7, 2012.
In this video, posted by the same individual from the previous video, a large group of UFOs seems to be heading away from the moon toward outer space.
Shot with a camera on a tripod, this poster says the video shows triangle-shaped UFOs appearing to orbit the moon.