Hello guys, I really appreciated all answers and tips. I'm a Brazilian guy living in Bergedorf, and I know about the big observatory they have, I went there a couple of times, but I've gone always on weekends or summer evenings, just to look around. I have never approached anyone there because I always thought that centre belonged to the University, and when I went there never met anyone from the observatory anyway. But I will look closely at their website as well as the one Marcus mentioned, The Gva. I will subscribe also to the facebook page UK Astronomy JSchmoll mentioned.
Thank you all of you, please if you have any further tip, don't hesitate to let me know.
