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Vanguard
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The orbits of the planets and other elements of the solar system, including asteroids, Kuiper belt, Oort cloud, comet
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Nicolaus Copernicus. Nicolas Copernicus (1473-1543) Polish astronomer. In 1543 he published, forward proof of a Heliocentric (sun centered) universe. Coloured stipple engraving published London 1802. De revolutionibus orbium coelestium libri vi.
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Vanguard: References & Edit History

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Article History

Type Description Contributor Date
Article revised and updated. Feb 12, 2020
Added photographs. Jul 30, 2015
Added/Edited contact info: Naval Research Laboratory - Vanguard Project. Jul 14, 2011
Add new Web site: Naval Research Laboratory - Vanguard Project. May 17, 2011
Stated that Vanguard is the oldest satellite in orbit. Sep 09, 2009
Article revised and updated. Nov 19, 2007
Article added to new online database. Jul 20, 1998
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