| 11. | He won the Copley Medal in 1777 for a paper on reflecting telescopes.
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| 12. | It was discovered in 1834 by John Herschel with an 18.7-inch reflecting telescope.
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| 13. | From " How To Make A Reflecting Telescope " ( 1934)
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| 14. | It was discovered in 1835 by John Herschel with an 18.7-inch reflecting telescope.
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| 15. | The 3.6m DOT is currently the largest reflecting telescope in Asia.
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| 16. | It was completed in 1668 and is the earliest known functional reflecting telescope.
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| 17. | He erected there an observatory with 15-inch ( 38-cm ) aperture reflecting telescope.
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| 18. | In 1671 the Royal Society asked for a demonstration of his reflecting telescope.
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| 19. | The telescope was surpassed in 1845 as the largest ever built by reflecting telescope.
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| 20. | The observatory houses two reflecting telescopes, including a Celestron Schmidt-Cassegrain.
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