1) Constellation 2) Constellation, Octant
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https://www.crosswordclues.com/clue/octans
Octans is notable as the location of the south celestial pole. Unlike the north pole, it has no bright pole star: Sigma Octantis (σ Oct) is a naked-eye star very close to the pole, but it is so faint (mag. +5.45) that it is practically useless for navigation purposes. Conveniently for navigators, the constellation Crux, the Southern Cross, points...
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http://en.wikipedia.org/wiki/Octans
[Chinese astronomy] The modern constellation Octans is not included in the Three Enclosures and Twenty-Eight Mansions system of traditional Chinese uranography because its stars are too far south for observers in China to know about them prior to the introduction of Western star charts. Based on the work of Xu Guangqi and the German Jesuit ...
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http://en.wikipedia.org/wiki/Octans_(Chinese_astronomy)
(abbr. Oct, gen. Octantis) The Octant; a faint constellation around the south celestial pole that includes Sigma Octantis, the South Pole Star. Its only star above magnitude 4.0 is Nu Oct (visual magnitude 3.73, absolute magnitude 2.10, spectral type K0III, distance 69 light-yea...
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http://www.daviddarling.info/encyclopedia/O/Oct.html
English name: The Octant. Genitive name: Octanis. Visibility: Never visible from the UK. See TABLE 20: THE CONSTELLATIONS.
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http://www.encyclo.co.uk/local/20448
[
n] - the constellation that includes the southern celestial pole
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http://www.webdictionary.co.uk/definition.php?query=Octans
noun the constellation that includes the southern celestial pole
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https://www.encyclo.co.uk/local/20974
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