Elements of theoretical and descriptive astronomy, for the use of colleges and academies (1901)
White, Charles J · New York: J. Wiley & sons · leaf 123
, after passingthrough the glass, begin to converge towards a fixed point inspace, with which, at this instant,the intersection of the cross-wiresFig. 49. v coincides. Let the earth be moving in the direction FA. Since the transmission of light is notinstantaneous, time is required for the light to… … ABERRATION. 117 is entirely independent of any motion of the telescope, will tendto meet at the point F. In order, then, to have the image of thestar coincide with the intersection of the wires, the telescopemust be so moved that its axis will lie in the position OF. Thestar will then appear to lie…
Astronomy
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