> Although one nitpick with the article - tracking mounts do not follow the rotation of the Earth, they rotate in the opposite direction. Maybe I missed someth

> Although one nitpick with the article - tracking mounts do not follow the rotation of the Earth, they rotate in the opposite direction. Maybe I missed something, but I don't see where the article contradicts what you wrote above. The one thing I did find seems correct (as it doesn't specify the direction): "With film and these very long exposures, the Earth’s rotation is a big problem — you’ll end up with star trails (which is a fun type of photo to take). The solution to this problem is a star tracker, a mount that precisely rotates your camera at the same rate as the Earth (known as sidereal rate)."