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Ara
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Ara

constellation
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Written by
Erik Gregersen
Erik Gregersen is a senior editor at Encyclopaedia Britannica, specializing in the physical sciences and technology. Before joining Britannica in 2007, he worked at the University of Chicago Press on the...
Erik Gregersen
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Latin:
“Altar”
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Ara, constellation in the southern sky, at about 17 hours right ascension and 55° south in declination. Ara has no bright stars; the brightest, Beta Arae, has a visual magnitude of 2.83. The constellation represents the altar on which Zeus and other Greek gods swore their allegiance before their war with the Titans.

Erik Gregersen