We have all heard about NASA. The National Aeronautics and Space Administration that covers all thing to do with space research and exploration. Well its no surprise that they have come across some strange things whilst carrying out research up their. So from an unusual piece of space debris that appears to be moving intelligently, to a recent 2016 UFO spotted on the live feed from the ISS. Here are five of the strangest pictures and videos captured by NASA, that are all unexplained.