20/08/2013 02:11 BST | Updated 19/10/2013 06:12 BST

Nasa Astronaut Reports 'UFO' Outside International Space Station (VIDEO)

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...

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