Hot night, couldn't sleep very well but I get woke at 3am so I went outside to sit in garden watching stars and I love doing that. After about 10 minutes the stars disappeared, didn't know why and at that same moment I saw something that was very big and black that blocked the sight to the stars. And then I could see something shiny silver because of the street lights on the other side of my house. It did not fly very fast and it flew right over my head, I must say it flew slowly but completely silent and it flew low, very low, about hundred meters. Before I could rap my mind around it, it was gone, over the roof of my house so I couldn't see it anymore. I know it was big, so big that I could not see where it begins and ends, of course that I couldn't see how big it was also because it was to dark.