How many official constellations divide the entire sky?

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Astronomical map Star trails over banksia trees, in Gippsland, Vic., Austl. The south celestial pole, located in the constellation Octans, is at the centre of the trails.

The entire sky is divided into 88 officially recognized constellations.

While constellations were historically viewed as patterns of stars, the International Astronomical Union (IAU) established this definitive list in 1922 and subsequently defined precise, rectilinear boundaries for each in 1930. Consequently, modern astronomers no longer regard constellations merely as star groupings, but as specific, unambiguous areas of the sky defined by lines of right ascension and declination.123