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 60
The apparent enlargement ofthese bodies when near the horizon is merely an optical delu.sion, which vanishes when their diameters are measured with anirstrument. PARALLAX. 53. The parallax of any object is, in the general sense of theword, the difference of the directions of the straight lines… … centric parallax, by which is meant the difference of the direc-tions of thestraightlinesdrawn tothecentreof anycelestialbodyfrom the earths centre and any point on its surface, and helio-centric parallax, or the difference of the directions of the linesdrawn to the centre of the body fromthe…
Astronomy
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