Astronomy, 2020

Document Type

Encyclopedia Article

Publication Date


Department 1



Since its debut in 1868, The World Almanac and Book of Facts has become the best-selling American reference book of all time, with more than 82 million copies sold. This essential household and workplace desk reference is “the most useful reference book known to modern man,” according to the L.A. Times. Renowned New York Times crossword puzzle editor Will Shortz calls it his “#1 reference work for facts.”

Dr. Marschall is the editor of the chapter on astronomy, which compiles astronomical data and information on celestial events, moon phases, eclipses, and astronomical positions and constants, as well as data on planets and satellites.



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