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This lesson plan is from Discovery Education's Lesson Plan Library. The Astronomical Scales lesson site describes how scaling factors can be used to make representations of astronomical distances; how to write and solve...
An algebrabased overview of elementary and pretelescope astronomy. Topics covered include sundials, seasons, calendars, precession, shape and rotation of Earth, Greek astronomy, the path to heliocentric theory and...
The Exploratorium in San Francisco has offered up this rather fun and interesting activity which gives interested parties the information to build their own scale model of the solar system. Visitors can start by filling...
This pair of web pages, authored and curated by David P. Stern, describes early calculations of the EarthMoon distance by Greek astronomers. Using lunar and solar eclipses, the astronomers Aristarchus and Hipparchus...
This website, developed by Maxine Phaisalakani at the University of Toronto Department of Astronomy and Astrophysics, introduces in a slide show presentation research that led to the discovery of the expansion of the...

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