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abstraction > mathematical concept > number > quantity > equatorial sky area > constellation > Hydra

Hydra comparison table

Subject	has definition	has synonym	has acronym	is a kind of	has genitive	is an instance of
constellation	Precisely defined area of the celestial sphere, associated with a grouping of stars, that the International Astronomical Union has designated as a constellation.			equatorial sky area	which is used when referring to a star in the constellation
Hydra		Serpent of Lerna	Hya		Hydrae	constellation

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