Aiming for the stars

This is my second attempt of capturing star trails.  I thought it would be impossible living close to Stockholm with both light and air pollution, but I tried.  This image consists of 101 exposures.  The first were shot before midnight and the last a bit after.  A bit of post processing and then I got this image. Please check it in the larger version.

Apologies for the branches in the upper left corner.  Next time I will try to find a better foreground.