Astronomy for the use of schools and academies (1882)
Gillet, J. A. (Joseph Anthony), 1837-1908, Rolfe, W. J. (William James), 1827-1910 · New York : Potter, Ainsworth, & Co. · leaf 104
nd 20 6 as seen from the other point, the twolines AB and DB must differ in direction by 6: in otherwords, the angle ABD would be 6. The method just described is the usual method of findingthe parallax of the moon. 88. The Apparent Size of the Moon.—The apparent sizeof a body is the visual angle… … Fig. 102. 88 ASTRONOMY. The apparent size, or angular diameter, of the moon isabout thirty-one minutes. This is ascertained by means ofthe wire micrometer already described (19). The instru-ment is adjusted so that its longitudinal wire shall passthrough the centre of the moon, and its transverse…
Astronomy
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
![An illustration from Nicolai Copernici Torinensis De reuolutionibus orbium coelestium, libri VI : Habes in hoc opere iam recens nato, & aedito, studiose lector, motus stellarum, tam fixarum, quàm erraticarum, cum ex ueteribus, tum etiam ex recentibus obseruationibus restitutos: & nouis insuper ac admirabilibus hypothesibus ornatos. Habes etiam tabulas expeditissimas, ex quibus eosdem ad quoduis tempus quàm facillime caculare poteris. Igitur eme, lege, fruere. [Line in Greek] (1543)](https://img.insideoutlibrary.com/img/200/ia-nicolaicopernici00cope-351-242.webp)
