Libra - Definition


Libra - Definition

This article is about the constellation. Libra is also a Roman coin and weight measure, see Ancient weights and measures. Libra is also a novel by Don DeLillo. LIBRA is also a political party in Croatia.

Libra
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Abbreviation	Lib
Genitive	Librae
Symbology	the Balance
Right ascension	15 h
Declination	−15°
Area	538 sq. deg. Ranked 29th
Number of stars (magnitude < 3)	2
Brightest star	Zubeneschamali (β Lib) (App. magnitude 2.6)
Meteor showers	May Librids
Bordering constellations	Serpens Caput Virgo Hydra Lupus Scorpius Ophiuchus
Visible at latitudes between +65° and −90° Best visible during the month of June

Libra (♎, and Latin for balance) is a constellation of the zodiac. It is a fairly inconspicuous constellation and has no star of first magnitude, lying between Virgo to the west and Scorpius to the east. As the names of the brighter stars testify, it was at one point part of Scorpius' claws.

Contents

Notable features

The brightest stars in Libra form a rectangle:

α Librae, Zubenelgenubi ("southern claw"), a visual binary;
β Librae, Zubeneschamali ("northern claw");
γ Librae, Zubenelakrab ("scorpion's claw");
σ Librae, an eclipsing variable.

α and β Librae are the scales' balance beam, and γ and σ are the weighing pans.

Mythology

The constellation, which originally formed part of the claws of the scorpion (Scorpio), is the youngest of the Zodiac and the only one not to represent a living creature. In later Greek mythology, the constellation, which when considered on its own looks vaguely like a set of scales, was considered to depict the scales held by Astraea (identified as Virgo), the goddess of justice.

Since Libra was originally part of Virgo (as scales), and before that part of Scorpio, it was not a distinct entity for which a zodiac sign was named. It's place may have been taken by Bo�tes, which is the nearest to the ecliptic. Since the place Bo�tes should have held on the ecliptic is vacant, it may have, together with Ursa Major, Draco, and Ursa Minor, also in Libra, lead to the the myth of the apples of the Hesperides, one of The Twelve Labours of Herakles.

Astrology

The astrological sign Libra (September 23 - October 22) is associated with the constellation.

In some cosmologies, Libra is associated with the classical element Air, and thus called an Air Sign (with Aquarius and Gemini). It is also one of the four cardinal signs (along with Aries, Cancer, and Capricorn). Its polar opposite is Aries. Each astrological sign is assigned a part of the body, viewed as the seat of its power. Libra rules the lower back and internal reproductive organs. The symbol for Libra is the Scales. Libran qualities include physical beauty, strong sensuality, artistic sensibilities, tact and diplomacy, and an innate sense of fairness and balance.

The 88 modern Constellations

ca:Balan�a de:Waage (Sternbild) eo:Pesilo fr:Constellation de la Balance ja:てんびん座 nl:Libra pt:Libra ru:Весы (созвездие) fi:Vaaka (t�hdist�)

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This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Libra".