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the peculiarities of nearly 20 Arp galaxies can be detected
Learn 17 bright finder stars and 17 prominent finder constellations so you will know where to look for all 110 Messier objects
first published 2016
differing in page size alone
Programs and Tables From -4000 to +2800 allow the computation of the positions of the Sun
Schupmann Telescope Atlases the peculiarities of nearly 20By James Daley. Product Information: Hardbound, 6 by 9 inches, 200 pages. Perfecting the refracting telescope has frustrated lens designers and glass makers since the invention of the telescope. This is because when using standard crown and flint glasses, residual longitudinal color (its dominant defect) cannot be reduced to an optically harmless value. Even today, the most expensive special glass apochromats show some noticeable color, especially at
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