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This page requires Silverlight 3. ...
http://www.worldwidetelescope.org/webclient/
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Over twenty interactive animations, orbital simulations, and learning tools for Planetary Science and Introductory Astronomy.
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simulator
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Astronomers and astrophysicists comb the rich HST public archive of exposures that has been accumulating for almost a decade and present a new picture each month.
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hubble
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Objective reviews for equipment and accessories submitted by astronomers, articles, classifieds, and forums.
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Astronomy, Space, teachers, students. Stars, galaxies, amateur astronomy, telescopes, education ... Cloudy Nights http://www.cloudynights.com/index.php ...
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Quality sky maps (star charts) for stargazing, education and publishing. The Evening Sky Map free each month. Find constellations, planets and comets.
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maps
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Official site for the The International Year of Astronomy 2009 (IYA2009), the global celebration of astronomy and its contributions to society and culture.
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2009
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Track seasonal cusp moments in universal time, according to the Earth's orbit. Includes lessons on the astronomical mechanics of equinoxes, soltices, and cross quarters.
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