PERIHELIA
PERIHELION
perihelion
(noun) periapsis in solar orbit; the point in the orbit of a planet or comet where it is nearest to the sun
Source: WordNet® 3.1
Noun
perihelia
plural of perihelion
plural of perihelium
Source: Wiktionary
PERIHELION
Per`i*hel"ion, Per`i*he"li*um, n.; pl. Perihelia. Etym: [NL., fr. Gr. (Astron.)
Definition: That point of the orbit of a planet or comet which is nearest to the sun; -- opposed to Ant: aphelion.
Source: Webster’s Unabridged Dictionary 1913 Edition
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