Thank you for the shooting info Otavio. I went out yesterday morning and unfortunately didn't have near the success that you have shown us here.
First of all, I was out before even a hint of sun was in the sky (Colin would be proud) and had a much darker scene to deal with (no city lights). Despite having a flashlight with me and a familiarity with the area I found it very difficult to identify a good composition in the dark. On top of that I am still learning my D7000 and couldn't figure out how to get the dang thing into bulb mode to enable an exposure longer than 30 seconds. Needless to say I cam home a bit disappointed but I did learn something and will be taking a hard look at the images today to make some notes for further improvement. Practice makes perfect, or so they say