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Aries

(Encyclopedia)Aries ârˈēz [key] [Lat.,=the ram], constellation lying on the ecliptic (the sun's apparent path through the heavens) between Taurus and Pisces; it is one of the constellations of the zodiac. It con...

Capricornus

(Encyclopedia)Capricornus kăprĭkôrˈnəs [key] [Lat.,=the goat horn], inconspicuous southern constellation lying on the ecliptic (the sun's apparent path through the heavens) between Sagittarius and Aquarius; it...

Gemini

(Encyclopedia)Gemini jĕmˈənī, –nē [key] [Lat.,=the twins], northern constellation lying on the ecliptic (the sun's apparent path through the heavens) between Taurus and Cancer, N of Canis Minor; it is one of...

Polaris

(Encyclopedia)Polaris pōlârˈĭs [key] or North Star, star nearest the north celestial pole (see equatorial coordinate system). It is in the constellation Ursa Minor (see Ursa Major and Ursa Minor; Bayer designat...

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...

zodiac

(Encyclopedia)CE5 Signs of the zodiac CEE zodiac zōˈdēăk [key] [Gr. zoion=animal], in astronomy, zone of the sky that includes about 8° on either side of the ecliptic. The apparent paths of the sun, the...

Ptolemy

(Encyclopedia)Ptolemy (Claudius Ptolemaeus), fl. 2d cent. a.d., celebrated Greco-Egyptian mathematician, astronomer, and geographer. He made his observations in Alexandria and was the last great astronomer of ancie...

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