A handbook of double stars, with a catalogue of twelve hundred double stars and extensive lists of measures. With additional notes bringing the measures up to 1879 (1879)
o been accompanied with a consider- able diminution of distance ; and further mr observations must decide whether this is the result of rectilinear or orbital motion. If the former, the minimum distance will be attained in about 40 years from the present time, and the change during that period much… … fully defined and round.'" H„ "Nov. 21, 1781.— If I do not see Hj adds, " This star presents the hitherto extremely ill this morning (4 a.m.), the large unique combination of three individuals, star consists of two." " Feb. 7, 1802. — forming, if not a system connected by the After long looking, I…
![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-255-160.webp)