0 0 you might also enjoy : http://www.brainpickings.org/index.php/2011/07/07/ordering-the-heavens-library-of-congress/ http://www.loc.gov/exhibits/world/heavens.html and why not http://www.brainpickings.org/index.php/2012/02/01/the-city-dark-history-of-night/