eARTh

the sands of Erg Chech, Algeria                                           NASA/USGS/Flickr

NASA has put together a beautiful collection of photographs of Earth taken by satellites. Because these satellites can measure light beyond the range that we can see, the images show us sights in a way we would never be able to see first-hand. The collection is in a free downloadable ebook (website): http://www.nasa.gov/connect/ebooks/earth_art_detail.html