15. UFO was Refueling At the Sun
Since NASA was first formed, they have employed a fleet of aircraft that were facing the sun. These spacecraft were made to keep an eye on the weather and solar eruptions.
In 2012, there were telescopic images that appeared, showing something hidden in the shadows. On YouTube, there were some users that claimed it could be a UFO or type of alien spacecraft that was using the sun to refuel.
Following the popularity of this video, rumors began to pop up online fully believing this theory. NASA later pointed out that this was something called prominence, which is a dense type of plasma that pops from the sun.
Scientists are still trying to figure out how these occur, but they are positive it has nothing to do with aliens.