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Perihelion - Dictionary Definition and Overview |
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Perihelion : (noun)
1: periapsis in solar orbit; the point in the orbit of a planet
or comet where it is nearest to the sun [ant: aphelion]
Based on WordNet 2.0
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Perihelion : \Per`i*hel"ion\, Perihelium \Per`i*he"li*um\, n.; pl.
Perihelia. [NL., fr. Gr. ? about, near _ ? the sun.]
(Astron.)
That point of the orbit of a planet or comet which is nearest
to the sun; -- opposed to aphelion.
Based on WordNet (r) 2.0 (August 2003)
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