Flying Saucer Glinting In The Sun As It Travels Over Derby UK - 07 09 2013
Witness statement: I think what what we are seeing here is a partly visible saucer!!
These craft are not visible to human eyes: However, sometimes the sun's huge infra-red output highlights their location by reflecting sunlight into our frequency range of white light!
Which makes them appear to morph & be translucent!
At other times though, they will be quite blatant about being seen!.