By the way, his website has some spectacular pictures.

David Clock Photography

Interesting point made by SierraNevada regarding geosynchronous satellites and their figure 8 "wobble". Web pages discuss this and mention that the satellites need to occasionally fire rockets to keep their position steady, due to gravitational effects of the sun and moon.

One thing I can't find in the discussions is the effect of the moon's gravity on the satellites. It would seem that those satellites would be pulled back and forth by their position relative to the moon, similarly to the way the ocean's tides oscillate. In fact, the figure 8 wobble's north and south oscillation can be explained by the satellite's orbital plane being at some angle to the equator's plane. But isn't the width of the figure 8 caused by the gravitational oscillations due to the moon?

Here's a youtube video that shows timelapse pics of the earth over 8 days: http://youtu.be/tvsW2aGq2QU