| 41. | The instruments are : 22-inch reflecting telescope.
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| 42. | On 13 March 1781, amateur astronomer William Herschel spotted a new planet with his powerful reflecting telescope.
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| 43. | Towards the end of the 19th century very large silver on glass mirror reflecting telescopes were built.
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| 44. | But reflecting telescopes had larger problems.
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| 45. | Newton also developed the reflecting telescope.
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| 46. | The difficulties with the impractical metal mirrors of reflecting telescopes led to the construction of large refracting telescopes.
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| 47. | The model was based on observations made by Blunt with his reflecting telescope from his home in Shrewsbury.
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| 48. | A third form of reflecting telescope, the " Cassegrain reflector " was devised in 1672 by Laurent Cassegrain.
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| 49. | Sagredo also discussed with Galileo the possibility of a telescope using a mirror ( a reflecting telescope ).
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| 50. | Subaru is a Ritchey-Chretien reflecting telescope.
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