How many constellations are there in the sky?

88 constellations, 1930. In order to unify the complicated division of constellations, the International Astronomical Union divides the sky into 88 official constellations with precise boundaries, so that every star in the sky belongs to a specific constellation.

Most of these official constellations are based on ancient Greek myths handed down from the Middle Ages. In contrast, some widely circulated star combinations are not recognized as official constellations, such as the Big Dipper.

Extended data

Significance and application of constellations: In ancient times, the ups and downs of stars or constellations were often used for navigation and timing. Ancient Egypt determined the beginning of a year by observing the rise of Sirius. In some areas, the ancient technology of determining position by observing stars still remains. Constellations and the literary images they represent often appear in the works of literati.

Although the importance of constellations has been relatively reduced in modern times, they have not lost their charm for astronomy lovers. Through its fascinating legend, constellations have played an extremely important role in the popularization of astronomy. Whenever there is a major astronomical phenomenon, astronomers, popular science workers and the media will always set off an astronomical upsurge in society, especially among young people.

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