head 1.1; access; symbols; locks; strict; comment @# @; 1.1 date 2018.03.14.17.01.32; author root; state Exp; branches; next ; desc @This document (Unit 2: Credits) is re-created by administrator on 31 August 2017 @ 1.1 log @Initial revision @ text @{ "_id": { "$oid": "59b65dd52c47962c1d001deb" }, "_type": "GSystem", "access_policy": "PUBLIC", "altnames": "Credits", "annotations": [], "attribute_set": [], "author_set": [ 1 ], "collection_set": [], "comment_enabled": null, "content": "", "content_org": "

Credits
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\r\nAnimation: Motions of the Moon and the Earth

\r\nPhET Interactive Simulations, University of Colorado Boulder. Phet Interactive Simulations: Gravity and Orbits Retrieved from: https://phet.colorado.edu/sims/html/gravity-and-orbits/latest/gravity-and-orbits_en.html

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\r\nActivity: AstRoamer: Moon Track
\r\nMoon Images:
NASA/Goddard Space Flight Center Scientific Visualization Studio Retrieved from: http://svs.gsfc.nasa.gov/4000

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