Berry, Arthur,b. 1862 · London, J. Murray · leaf 429
the necessary calculations in such a way thatthey could be performed with very little labour and by analmost mechanical process, such as could easily be carriedout by a moderately skilled assistant. In addition toediting Bradleys observations, Bessel undertook a freshseries of observations of his… … «* Fig. 85.—61 Cygni and the two neighbouring stars used by Bessel- work was the first definite detection of the parallax of afixed star. He abandoned the test of brightness as an $ 278] The Parallax of 61 Cygni 361 indication of nearness, and selected a star (61 Cygni)which was barely visible to…
Astronomy
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