A massive 3000-mile wide, unrecognized disc was caught in a NASA slide above the earth and nobody knows exactly what it is.
The image was taken from the ISS and was first shown at a Brasilia Planetarium Presentation in 2013.
The question has been asked, ” Is it an alien mothership or a planetary defense shield?”
I think it is very interesting that they discovered so big and that nobody knows what it is.
Check the Video on the Next Page: