How is this shot not overexposed or lots of star trails

I found this from a previous thread
http://www.pbase.com/b​illhuegerich/image/819​37985

Per the photographer, he had the shutter open for almost 3 minutes...this is only one shot too.

I have a G11 (I know its a P&S compared to what he used)...but how is it not overexposed and how is it that there are no movement (trails) in this shot?

He had the camera on a tracking mount of some sort. Thus the "movement" is seen in the house and trees since they're a little blurry and the stars stay pinpoint since they're not moving relative to the camera.

As to overexposure, it was dark enough that 3 minutes produced the proper exposure. The ground was probably very dark and only looks well-lit due to the long exposure.

I can't believe it took him 3 minutes to achieve that shot. I've gotten shots like that using a 30 second shutter speed, just need a really high ISO and a fast lens to pull it off.