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| − | For an object [[Orbit|orbiting]] a celestial body, the '''periapsis | + | For an object [[Orbit|orbiting]] a celestial body, the '''periapsis' is the point in the orbit which is ''closest'' to that body. |
'''Periapsis''' and '''[[apoapsis]]''' are generic terms. The prefixes "peri-" and "apo-" are commonly applied to the Greek or Roman name of the particular body being orbited. | '''Periapsis''' and '''[[apoapsis]]''' are generic terms. The prefixes "peri-" and "apo-" are commonly applied to the Greek or Roman name of the particular body being orbited. | ||
As an example, consider perigee and apogee for [[Earth]], perijove and apojove for [[Jupiter]], periselene and aposelene or perilune and apolune for [[Moon|lunar orbit]], perichron and apochron for [[Saturn]], perihelion and apohelion for the [[Sun]], etc. | As an example, consider perigee and apogee for [[Earth]], perijove and apojove for [[Jupiter]], periselene and aposelene or perilune and apolune for [[Moon|lunar orbit]], perichron and apochron for [[Saturn]], perihelion and apohelion for the [[Sun]], etc. | ||
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