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Cats_Eye_N6543.jpg
NGC 6543 (Cats Eye nebula) by John Gianforte

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July 2012
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(1054) Supernova explodes that produced the Crab Nebula.
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(1687) Isaac Newton published 'Principia Mathematica'.
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(2011) Neptune completes one full orbit since discovery (Sept 23, 184)..
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(1965) First flyby of Mars, first close-up images by Mariner 4.
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(1850) First daguerreotype of a star - Vega by W. C. Bond and J. A. Wippple.
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(1969) Apollo 11 lands on the Moon. Neil Armstrong walks on th Moon.
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(1999) Chandra X-ray telescope is launched from the space shuttle Columbia.
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(1609) First observation by telescope - Thomas Harriot observes the Moon.
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