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Apastron

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WordDefinition
apoastronnoun(astronomy) Alternative form of apastron. [(astronomy) The point of greatest separation between a celestial object and the star which it orbits.]
periastronnoun(astronomy) That point of the orbit of a celestial body which is closest to the star around which the body is orbiting.
apocynthionnoun(astronomy) The point in an orbit around the Moon that is most distant from that body.
apogeenoun(figuratively) The highest point.
apoapsisnoun(astronomy) The point of a body's elliptical orbit about the system's centre of mass where the distance between the body and the centre of mass is at its maximum.
apsisnoun(astronomy) Either of the points in the elliptical orbit of a planet, comet, or moon where it is closest or furthest from the body it orbits; examples are perihelion, aphelion, perigee, and apogee
apocenternoun(astronomy) The furthest point of an astronomical object in an elliptical orbit to its center of attraction (the principal focus of the ellipse)
apobaryonnoun(astronomy) The furthest point of an astronomical object in an elliptical orbit to the center of mass of the system.
periapsisnoun(astronomy, astrophysics) The point of a body's (elliptical) orbit in a 2-body gravitational system such that the distance between the two bodies (measured from their respective centres of mass) is at its minimum.
apexnounThe highest or the greatest part of something, especially forming a point.
apapsisnounAlternative form of apoapsis. [(astronomy) The point of a body's elliptical orbit about the system's centre of mass where the distance between the body and the centre of mass is at its maximum.]
aphelionnoun(astronomy, also figuratively) The point in the elliptical orbit of a comet, planet, or other astronomical object, where it is farthest from the Sun.
apocentrenounAlternative form of apocenter. [(astronomy) The furthest point of an astronomical object in an elliptical orbit to its center of attraction (the principal focus of the ellipse)]
apogalacticonnoun(astronomy) The point in the orbit of a star at which it is furthest from the centre of its local galaxy
apohermnoun(astronomy) In an orbit around the planet Mercury, the point that is most distant from Mercury.
peribothronnoun(astronomy) The point in an elliptical orbit around a black hole where the orbiting body is closest to the black hole.
pericenternoun(astronomy) The point of closest approach of an astronomical object in an elliptical orbit to its center of attraction.
perigalacticumnoun(astronomy) The closest point in a star's orbit around the centre of a galaxy (the galactic periapsis).
apsenoun(architecture) A semicircular projection from a building, especially the rounded east end of a church that contains the altar.
antapexnoun(astronomy) The point opposite the solar apex

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