The authors of the open textbook on which this material was originally based were Andrew Fraknoi (Foothill College), David Morrison (NASA Ames Research Center), and Sidney Wolff (National Optical Astronomy Observatories).
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Cover Image: "Constellation Night Sky." Authored by: MaxPixel. Located at: http://maxpixel.freegreatpicture.com/Constellation-Night-Sky-Sky-Cosmos-Astronomy-Stars-1245902. Content Type: CC Licensed Content, Shared Previously. License: CC0: No Rights Reserved.
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