Long exposure at night ...

Click for a larger picture

This is actually a very interesting picture.

The camera is mounted on a tripod, capturing the minimal light provided by the few stars and the lights from the school and beyond the park.

The really interesting part is the way that the stars have shifted during the long exposure. By "long exposure", I'm talking around 1 - 1.5 seconds. The fact that those stars (the top half of Orion (see the belt) and Sirius, the brightest star in the night sky) moved that much during that 1 to 1.5 seconds is a testament to just how fast the earth is moving. In the moment, it's hard to see that the stars move at all, but this proves not only that they do, but how fast they do.

A mathmatician with some star charts could probably tell you exactly how long the exposure was (measure the distance between the stars to get an idea of the focal length, then measure the shift and divide by the known speed of the earth's rotation), but I know that I only counted to 1 and was on my way to 2 when it closed.