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Science -- Physics
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This web page, authored and curated by David P. Stern, outlines the math and applications of parallax. Parallax is the shift in the apparent direction to an object when it is viewed from two separated locations. It...
Magnetospheres of other Planets
This web page, authored and curated by David P. Stern, outlines the magnetic properties of the planets. Most large planets in the solar system have magnetic fields, probably produced quite differently from ours. This is...
This web page, authored and curated by David P. Stern, describes the causes of naturally occurring magnetite magnets, or 'lodestones.' It explains theories about the function of lightening and heat in such processes,...
This web site, authored and curated by David P. Stern, contains an elementary discussion of the physics of airplane flight. Concepts of frames of reference and vectors are used to explore lift, drag, and thrust for...
Distance to the Moon
This pair of web pages, authored and curated by David P. Stern, describes early calculations of the Earth-Moon distance by Greek astronomers. Using lunar and solar eclipses, the astronomers Aristarchus and Hipparchus...
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