My Wife told me there were going to be metior showers over the next few days. So I refreshed my memory on how to use the "buLb" setting and took a number of pictures. Here are the best two. Both pictures are about a 1 minute exposure, f4.5, ISO 3200, using the Sigma 10-20 at 20mm. Leaving the shutter open for much more than a minute resulted in blurred stars as the rotation of the Earth changes the camera's position relative to the stars.
In order to use the "buLb" setting you set your Nikon camera to "S" or "M" mode and rotate the command dial past the longest shutter speed to the "buLb" setting. Then using your Nikon remote you press the button once to open the shutter and when you are ready press the button again to close the shutter.