On the Construction of a Silvered Glass Telescope Fifteen and a half inches in aperture, and its use in celestial photography

Генрі Дрейпер On the Construction of a Silvered Glass Telescope Fifteen and a half inches in aperture, and its use in celestial photography
ISBN:
2000000001173
Мова:
англійська
Автор:
Генрі Дрейпер
Видавництво:
Project Gutenberg
Рік видання:
2016 р.
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The construction of a reflecting telescope capable of showing every celestial object now known, is not a very difficult task. It demands principally perseverance and careful observation of minutiæ. The cost of materials is but trifling compared with the result obtained, and I can see no reason why silvered glass instruments should not come into general use among amateurs. The future hopes of Astronomy lie in the multitude of observers, and in the concentration of the action of many minds. If what is written here should aid in the advance of that noble study, I shall feel amply repaid for my labor.

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