The book's front cover background image was resized and cropped from an image taken by the crew of Expedition 23 on board the International Space Station (ISS) on May 25, 2010 and shows an edge-on view of the Earth's atmosphere over the Indian Ocean (outer space is to the upper right). The image is provided by the ISS Crew Earth Observations experiment and Image Science and Analysis Laboratory, at NASA's Johnson Space Center. The image is available online at http://earthobservatory.nasa.gov/IOTD/view.php?id=44267 and is not copyrighted.
