
1) Constellation 2) Constellation 3) Constellation, Snake
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https://www.crosswordclues.com/clue/serpens

Serpens Cauda: The brightest star in Serpens is Unukalhai or Cor Serpentis `Serpent`s Heart`, with an apparent magnitude of 2.63. Part of the Milky Way passes through Serpens Cauda, which is therefore rich in deep-sky objects, such as the Eagle Nebula (IC 4703) and its associated star cluster Messier 16. The nebula measures 70 light-years by 50......
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http://en.wikipedia.org/wiki/Serpens
[Chinese astronomy] The modern constellation Serpens lies across one of the quadrants, symbolized by the Azure Dragon of the East (東方青龍, Dōng Fāng Qīng Lóng), and Three Enclosures (三垣, Sān Yuán), that divide the sky in traditional Chinese uranography. The name of the western constellation in modern Chinese is 巨蛇座 (j...
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http://en.wikipedia.org/wiki/Serpens_(Chinese_astronomy)

• (n.) A constellation represented as a serpent held by Serpentarius.
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http://thinkexist.com/dictionary/meaning/serpens/
(abbr. Ser, gen. Serpentis) The Serpent, wrapped around Ophiuchus, the Serpent Bearer. Serpens is a faint constellation of the northern hemisphere. It is unique in being the only constellation split into two parts, neither of which touches the other. Entwined around and separate...
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http://www.daviddarling.info/encyclopedia/S/Ser.html

English name: The Serpent. Genitive name: Serpentis. Visibility: Visible from the UK See TABLE 20: THE CONSTELLATIONS.
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http://www.encyclo.co.uk/local/20448
Ser'pens noun [ Latin See
Serpent .]
(Astron.) A constellation represented as a serpent held by Serpentarius.
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http://www.encyclo.co.uk/webster/S/73

[
n] - a constellation in the equatorial region of the northern hemisphere near Ophiuchus and Corona Borealis
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http://www.webdictionary.co.uk/definition.php?query=Serpens
noun a constellation in the equatorial region of the northern hemisphere near Ophiuchus and Corona Borealis
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https://www.encyclo.co.uk/local/20974

Constellation on the celestial equator (see celestial sphere), represented as a serpent coiled around the body of Ophiuchus. It is the only constellation divided into two halves: Serpens Caput, the head (on one side of Ophiuchus), and Serpens Cauda, the tail (on the other side). Its main feature is the Eagle nebula
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https://www.encyclo.co.uk/local/21221
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