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 384
ravity. Inmany instances their orbits andperiods of revolution have beenascertained by observation and ¥{s- 4*4-calculation. Fig. 415 shows the orbit of one of the com-ponents of a double star in the constellation Hercules. 351. Colors of Double and Multiple Stars. — The com-ponents of double and… … 358 ASTRONOMY. star is combined with a blue one. Other colors found ircombination in these systems are red and blue, orange andgreen, blue and green, yellow and blue, yellow and red, etc.If these double and multiple stars are accompanied b\
Astronomy
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