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Official site for NASA, the United States space agency, providing current information on its robotic and manned space exploration missions.
http://www.nasa.gov/
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Lists 82 educational web pages by David P. Stern, on misc. science topics ... http://www.phy6.org/Education.zip (4)" All Things Electric and Magnetic ", overview below, ...
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Collection of scientific instruments to build yourself and experiments for amusement and didactic scope.
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All documents have been written by myself and are free for use in the public ... have been created by myself and are also in the public domain, with these ...
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Research site dedicated to the analysis of NASA photographic evidence of artifacts on the Moon.
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To understand why we have seasons, we need to look at the relations ... The sun's rays are pretty close to parallel to each other when they reach the Earth, ...
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