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ecliptic
(Encyclopedia)ecliptic ēklĭpˈtĭk, ĭ– [key], the great circle on the celestial sphere that lies in the plane of the earth's orbit (called the plane of the ecliptic). Because of the earth's yearly revolution a...ecliptic coordinate system
(Encyclopedia)ecliptic coordinate system, an astronomical coordinate system in which the principal coordinate axis is the ecliptic, the apparent path of the sun through the heavens. The ecliptic poles are the two p...obliquity of the ecliptic
(Encyclopedia)obliquity of the ecliptic: see inclination. ...inclination
(Encyclopedia)inclination, in astronomy, the angle of intersection between two planes, one of which is an orbital plane. The inclination of the plane of the moon's orbit is 5°9′ with respect to the plane of the ...precession of the equinoxes
(Encyclopedia)CE5 Precession of the equinoxes (the points at which the earth's celestial equator intersects its ecliptic) is due to the slow rotation of the earth's axis around a perpendicular to the ecliptic. ...node
(Encyclopedia)node, in astronomy, point at which the orbit of a body crosses a reference plane. One reference plane that is often used is the plane of the earth's orbit around the sun (ecliptic). Since the moon's o...Aquarius
(Encyclopedia)Aquarius əkwârˈēəs [key] [Lat.,=water carrier], large constellation located on the ecliptic (the sun's apparent path through the heavens) between Capricornus and Pisces; it is one of the constell...equinox
(Encyclopedia)equinox ēˈkwĭnŏks [key], either of two points on the celestial sphere where the ecliptic and the celestial equator intersect. The vernal equinox, also known as “the first point of Aries,” is t...Pisces
(Encyclopedia)Pisces pīˈsēz [key] [Lat.,=the fishes], constellation lying directly S of Andromeda and on the ecliptic (the sun's apparent path through the heavens) between Aries and Aquarius; it is one of the co...Cancer, in astronomy
(Encyclopedia)Cancer [Lat.,=the crab], in astronomy, constellation lying on the ecliptic (the sun's apparent path through the heavens) between Gemini and Leo; it is a constellation of the zodiac. It contains the st...Browse by Subject
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