Stars and telescopes; a hand-book of popular astronomy founded on the 9th ed. of Lynn's Celestial motions (1901)
Todd, David P. (David Peck), 1855-1939, Lynn, William Thynne, 1835-1911 · Boston, Little, Brown · leaf 335
no fewer than 282 Stars and Telescopes 3,134 double stars was published at Saint Petersburgin 1837, containing the results of his observations atDorpat and Pulkowa. Many of the binary stars have aregularorbital revolution,the most interesting casesbeing £ Herculis, £ UrsaeMajoris, and 70… … f. g. w. struve (1793-1S64) than any of these, and therefore less precise, are theperiods of those interesting and long-known doublestars, y Virginis, y Leonis, and Castor, the first ofwhich amounts to nearly 200, the second to about400, and the third to nearly 1,000 years. Accurate investigation…
Astronomy
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