Definitions
from The Century Dictionary.
- noun The correction for the effect on astronomical phenomena, especially eclipses of Jupiter's satellites, of the time required by light to traverse the space between the planet and the earth. This is combined with aberration (which see).
Etymologies
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Examples
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Glasenapp's "light-equation," with which it was combined, errs slightly by excess.
A Popular History of Astronomy During the Nineteenth Century Fourth Edition 1874
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"mean radius" of the earth's orbit, is called the "light-equation"; and the determination of its precise value has claimed the minute care distinctive of modern astronomy.
A Popular History of Astronomy During the Nineteenth Century Fourth Edition 1874
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