A star-like object was hovering for around 10 minutes in the sky.
I was sitting on by balcony and smoking a cigarette.
When I was finished, I just wanted to look at some clouds, and there it was.
Since I have been watching the sky over Vienna the whole summer, and have seen nearly everyday at around 21:15h "strange lights" that where flying with enormous speed, and suddenly stopping, and accelerating after 4-5 minutes to highspeed, my first thought was that it could be an UFO.
This object was just hovering there for like 10 minutes, and after a big cloud moved over it for some seconds, it was gone.
When I noticed it, I ran into my room, told my girlfriend what I saw, took her "Cannon EOS 500D", ran back with her to the balcony, and took one snap of it, and we where seeing it both of us, I felt how my heart started beating faster and felt some strange things.
I also took some photos of the airplanes in the area for comprehension, and none