Earth Phases JS Model Documents

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Main Document

Earth Phases JS Model 

written by Todd Timberlake and Mario Belloni

The Earth Phases JS Model illustrates the changing regions of darkness and light on the Earth over the course of a single day, or over the course of an entire year. The image shows the a NASA photograph of Earth from space. Areas of the Earth for which it is daytime are shown in full color, while areas for which it is nighttime are shown in a deep shadow. Controls allow the user to adjust the time of day and the day of the year. Optional controls display a marker with an adjustable latitude. The program can use either the mean sun or the true sun to determine regions of night and day.

Published December 26, 2014
Last Modified December 26, 2014

Source Code Documents

Earth Phases JS Model Source Code 

Source Code for the Earth Phases JS Model program.

Released under a This material is released under the Creative Commons Attribution-Noncommercial-Share Alike 3.0.

Published December 26, 2014
Last Modified December 26, 2014