periapsis Definition
Definition
The point in an orbit of a celestial body or spacecraft closest to the body being orbited. It is analogous to perihelion for the Sun, perigee for the Earth, and perilune for the Moon.
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The point in an orbit of a celestial body or spacecraft closest to the body being orbited. It is analogous to perihelion for the Sun, perigee for the Earth, and perilune for the Moon.
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