A constellation consists of a set of stars and other celestial objects in a particular region of the sky. The development of astronomical observation devices has provided greater precision in identification of the constellations and, according to the International Astronomical Union (UAI), there are 88 of them registered.
These sets of stars are classified into four groups, with location being the main criterion for this division: Borealis (Celestial Hemisphere North), Australs (Southern Celestial Hemisphere), Zodiacals (near the limits between the Northern and Southern Celestial Hemispheres) and Equatorial (“cut” by the Equator Heavenly).
Main constellation of the Southern Hemisphere, the Southern Cross, also called Crux, has always been observed by peoples of this hemisphere, as it is an excellent watch – the lines formed by its Rubídea and Magellan stars (its longest arm) rotate around the pole at approximately 24 hours.
In the Northern Hemisphere, the main constellation is Ursa Major, which is located near the north celestial pole. This is the third largest constellation and its stars are very bright and can be easily identified.
The study of constellations has been carried out since ancient times, being of great importance for the formulation of astronomical theories and for the development of agriculture. Currently, this approach helps in identifying directions in the universe and characterizing the sky.
By Wagner de Cerqueira and Francisco
Graduated in Geography
Brazil School Team
Curiosities - geography - Brazil School
