Richard A. Proctor 
Half hours with the Telescope 

समर्थन
The object which the Author and Publisher of this little work have proposed to themselves, has been the production, at a moderate price, of a useful and reliable guide to the amateur telescopist.
Among the celestial phenomena described or figured in this treatise, by far the larger number may be profitably examined with small telescopes, and there are none which are beyond the range of a good 3-inch achromatic.
The work also treats of the construction of telescopes, the nature and use of starmaps, and other subjects connected with the requirements of amateur observers.
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भाषा अंग्रेज़ी ● स्वरूप EPUB ● पेज 125 ● ISBN 9783749432066 ● फाइल का आकार 0.4 MB ● प्रकाशक Books on Demand ● प्रकाशित 2019 ● संस्करण 1 ● डाउनलोड करने योग्य 24 महीने ● मुद्रा EUR ● आईडी 7421880 ● कॉपी सुरक्षा सामाजिक DRM

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