The Saguaro Astronomy Club's database of over 10,000 objects, allowing amateur astronomers to compile detailed and customized observing lists. From the Exporitorium Museum in San Francisco. Utilizes the RealPlayer and QuickTime plugins. Fortunately for us, the Messier Catalog became well known for a much higher purpose, as a collection of the most beautiful objects in the sky including nebulae, star clusters, and galaxies. Maps delivered in PostScript format.
Essays discuss the great cosmological questions of the origins of the universe.
Brief explanations for complex cosmological phenomena and short biographies of seventeen giants of cosmology. Spectacular photos of nebulae usually available only through a telescope.