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Words related to perihelion
per·i·he·li·on
P p -
anomalistic year
the interval between two successive passages of the earth through perihelion; 365.25964 mean solar days -
aphelion
the point in its orbit when a planet or comet is at its greatest distance from the sun -
halley's comet
a comet with a period averaging 76 years. In this century it was visible to terrestrial observers just before and after reaching perihelion in 1910 and again in 1986. -
mean anomaly
the anomaly of a mean planet; the angular distance of the planet from perihelion or aphelion. -
mean planet
a hypothetical planet that coincides with a real planet when the real planet is at perihelion and that moves in an orbit at a constant velocity equal to the mean velocity of the real planet. -
peri-
enclosing, encircling, or around