I talked about framing in some of my other blog posts. I could have taken the picture above with just the moon in the frame, but chose to move my tripod so that I would have the tree to the left and the moon to the right. It makes the image much more interesting and gives it a sense of place.
Finally, both the sun and moon had left for the night and it was time for me to capture a star-trail shot. I looked for a location where I could see a lot of the sky, but also frame the image with some of the large trees which surrounded us. I then set my camera on my Gitzo tripod, aimed the camera straight up (using my 24-105mm lens), put it in bulb mode and locked the remote for a 10 minute exposure. It turned out that 10 minutes was not enough, so I tried a 20 minute exposure. Still not good enough. So...at 11pm, I decided to lock the shutter for an hour and see what happened. Actually, I was concerned that the Canon battery would not last that long, but there was plenty of power for this long exposure. So 62 minutes later, after sitting there and marveling at the clarity of the night sky, I closed the shutter and looked at the final image on the LCD of the camera. Pleased with the results, I slipped into my sleeping bag a happy camper (pun intended).