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Encyclopedia of Science and Technology
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Encyclopedia of Science and Technology

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Libra The Scales, a southern zodiacal constellation (see illustration). It has no bright stars. Traditional pictures show a set of scales (a balance) with pans held by chains. Perhaps its name comes from the nearby constellation Virgo, who was the goddess of justice and who would have used scales to balance good and evil deeds. Also, the autum- Magnitudes: 16h 15h 0° –30° –10° –20° right ascension declination 4.0–4.5 4.5–5.0 5.0–5.5 5.5–6.0 Variable 3.5–4.0 3.0–3.5 2.5–3.0 2.0–2.5 1.5–2.0 VIRGO SERPENS CAPUT HYDRA LUPUS CENTAURUS SCORPIUS OPHIUCHUS LIBRA 48 ξ1 ξ2 α β γ δ ε η ζ ϑ κ ι λ μ ν σ τ υ ecliptic Zubenelgenubi Zubenelschamali Modern boundaries of the constellation Libra, the scales. The celestial equator is 0◦ of declination, which corresponds to celestial latitude. Right ascension corresponds to celestial longitude, with each hour of right ascension representing 15◦ of arc. A
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