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Astro_yyz: Randall Rosenfeld
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Astro_yyz: P1080549
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Astro_yyz: P1080552
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Astro_yyz: chronometer
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Astro_yyz: sundial
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Astro_yyz: Gregorian telescope
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Astro_yyz: P1080563
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Astro_yyz: John Percy
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Astro_yyz: Ralph Chou
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Astro_yyz: P1080587
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Astro_yyz: P1080588
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Astro_yyz: P1080589
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Astro_yyz: P1080593
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Astro_yyz: P1080597
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Astro_yyz: P1080601
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Astro_yyz: P1080604
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Astro_yyz: P1080612
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Astro_yyz: Ari Gross and Erich Weidenhammer UTSIC
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Astro_yyz: Paul Greenham - U of T's Scientific Instrment Collection
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Astro_yyz: Prof Pasachoff
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Astro_yyz: Dr. Mike Reid
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Astro_yyz: Prof James Graham and Prof Jay Pasachoff