The elements of theoretical and descriptive astronomy, for the use of colleges and academies (1901)
White, Charles J. (Charles Joyce), 1839-1917 · New York, J. Wiley & sons; · leaf 226
them, during the year. Fig. 76 will serve toplain the general principle of thismethod. Let S be the position of thestar whose parallax is sought, and sthe 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 Cc: 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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