John, that is two seperate shots. I dont have the newest flippy dippy insane high ISO camera out there, so I am stuck with the older trick of one frame after dusk while some minor ambient light is still bouncing around our atmosphere. Then I just leave the camera on the tripod, wait a few hours and take the stars portion of the shot. Process both as they appeared, and walla. I have a starry night shot with the blend of two night shots.
Hoping this year, I can get the D5100 for just this purpose. I don't want or need Full Frame, this little DX camera is better at high ISO and shadow recovery as well as Dynamic Range of the D3X. The sensor is all I will need, and I get to dabble in movies and get the articulating screen which I am seriously looking forward to. (and why I wolnt go with the D7000 or my D300 replacment when it comes out. Most of my work that sells is about perspective, and that articulating screen will be a serious help.
Roman