1911 Encyclopædia Britannica/Aphelion
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| ←Aphasia | 1911 Encyclopædia Britannica, Volume 2 Aphelion |
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| See also Apsis on Wikipedia, and our 1911 Encyclopædia Britannica disclaimer. |
APHELION (from Gr. ἀπό, from, and ᾔλιος, sun), in astronomy, that point of the orbit of a planet at which it is most distant from the sun. Apogee, Apocentre, Aposaturnium, &c. are terms applied to those points of the orbit of a body moving around a centre of force—as the Earth, Saturn, &c.—at which it is farthest from the central body.
