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parallax of a celestial body using two points in the earth's orbit around the sun as the baseline annual parallax , heliocentric parallax
apoapsis in solar orbit; the point in the orbit of a planet or comet that is at the greatest distance from the sun aphelion
orbit of celestial body farthest from sun, point of aphelion
comet, point farthest from sun in orbit of aphelion
(astronomy) the point in an orbit farthest from the body being orbited apoapsis , point of apoapsis
apoapsis in Earth orbit; the point in its orbit where a satellite is at the greatest distance from the Earth apogee
orbit of moon or satellite farthest from earth, point of apogee
moon's orbit is most distant from center of Earth, point when apogee
apoapsis in orbit around Jupiter apojove
asteroid whose orbit crosses the Earth's orbit Apollo asteroid
orbit around moon farthest from moon's center, point of apolune
apoapsis in orbit around the moon apolune , aposelene
orbit of celestial body from center of attraction, closest or farthest point in apse , apsis
point in an eccentric orbit apsis
originates from the maxillary artery and supplies structures below the orbit (from lower eyelid to upper lip) arteria infraorbitalis , infraorbital artery
point at which an orbit crosses the ecliptic plane going north ascending node
acceleration toward the center that holds a satellite in elliptical orbit centripetal acceleration
asteroid discovered in 1977; it is unique in having an orbit lying mainly between the orbits of Saturn and Uranus Chiron
(astronomy) a relatively small extraterrestrial body consisting of a frozen mass that travels around the sun in a highly elliptical orbit comet
artificial satellite that relays signals back to earth; moves in a geostationary orbit communications satellite
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