Re: Don Pettit took this picture (today's APOD)
If you look carefully at the stars, they are elongated in the direction of ~150 degrees (clockwise from top).
If you read Don Pettit's pages, he shows how he uses a rechargeable battery-powered drill as a motor to drive reduction gears in a (slowly) moving mount to correct for ISS rotation (1 rev per ~90 mins, in LEO).
It isn't perfect, but it's pretty good.