Berry, Arthur,b. 1862 · London, J. Murray · leaf 93
tojustify him in concluding that the change could beaccounted for, not as a motion of individual stars, butrather as a change in the position of the equinoctialpoints, from which longitudes were measured. Now thesepoints are the intersection of the equator and the ecliptic:consequently one or… … Fig. 21.—The increase of the longitude of a star. by a motion of the equator. Again, Hipparchus measuredthe obliquity of the ecliptic as several of his predecessorshad done, and the results indicated no appreciable change.Hipparchus accordingly inferred that the equator was, asit were, slowly…
Astronomy
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