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(astronomy) position of a planet as defined by its angular distance from its perihelion (as observed from the sun) anomaly
apoapsis in solar orbit; the point in the orbit of a planet or comet that is at the greatest distance from the sun aphelion
sun, when planet is farthest from aphelion
planet at farthest point from Sun aphelion
minor planet asteroid
small planet asteroid
planet or celestial body, very small asteroid , minor planet , planetoid
German mathematician and astronomer who made accurate measurements of stellar distances and who predicted the existence on an 8th planet (1784-1846) Bessel , Friedrich Wilhelm Bessel
regions of the surface and atmosphere of the Earth (or other planet) where living organisms exist biosphere
process whereby a star or planet holds an object in its gravitational field capture
United States astronomer who discovered the planet Pluto (1906-1997) Clyde Tombaugh , Clyde William Tombaugh , Tombaugh
period of time taken by a particular planet (e.g. Mars) to make a complete rotation on its axis day
planet (usually Venus) seen just before sunrise in the eastern sky daystar , Lucifer , morning star , Phosphorus
third planet from the Sun Earth
3rd planet from the sun; the planet we live on Earth , globe , world
planet orbit that is not circular, of a eccentric
Neptune planet order eighth
astrologer's table of planet and star positions ephemeris
star and planet position chart or almanac ephemeris
planet (usually Venus) seen at sunset in the western sky evening star , Hesperus , Vesper
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