Finally I did it, on Saturday the sky was clear and the stars were shining! I took the stuff and I went in the middle of nowhere to avoid the city light pollution. It was the first time I did stars photography so the outcome is not like I was imagine, but still ok. At least I have learned some more things. I hoped even to get a falling star, but they were to shy. I saw beautiful ones always when the camera was not shooting.
The greatest thing of that is to be in the night silence and have jut nature around you, it is a magical experience and I want to do again, perhaps with more batteries and a torch… -.-