Elements of theoretical and descriptive astronomy, for the use of colleges and academies (1901)
White, Charles J · New York: J. Wiley & sons · leaf 234
during the year. Fig. 76 will serve to ex-plain the general principle of this amethod. Let S be the position of thestar whose parallax is sought, and *the position of the smaller star, bothbeing projected on the surface of thecelestial sphere. By the motion of theearth in its orbit the star S will… … 222 MAGNITUDE OF THE STARS. in different directions, and that Dd will be greater than (7c; and,therefore, by observing the different directions of the line joiningthe two stars, and also its different values, during the year, wcmay obtain the difference of parallax of the two stars, and,…
Astronomy
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