Flammarion, Camille, 1842-1925, Welby, Frances A. (Frances Alice) tr · New York, D. Appleton and company · leaf 325
eproportion. But the stars are allso distant that their annual dis-placement of perspective is almostimperceptible, and very exact in-struments are required for its de-tection. 17 o c 11 The researches of the astrono- riG. 04,—omall ap-parent ellipses de- mers have proved that there is notscribed… … ^fT ON METHODS traordinary difficulties experienced in measuring thedistance of the stars, will be appreciated from the factthat the value of a second is so small that the displace-ment of any star corresponding with it could be coveredby a spiders thread. A second of arc corresponds to the size of…
Astronomy
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![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-229-139.webp)
