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L'Association des professeurs des science de l'Ontario
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1949 The Hale telescope at Palomar Observatory sees first light under the direction of Edwin Hubble, becoming the largest aperture optical telescope (until BTA-6 is built in 1976).

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Teachers Who Inspired Great Scientists

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STAO Featured Link:

Derek Muller Derek Muller - The Secret to Engagement
You may have missed Derek at STAO 2013. Here is his talk at the Perimeter Institute
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