when was it first discovered?
Prehistory
Constellation
The origins of the earliest constellations likely go back to prehistory. 
what is canis major? A constellation what are its characteristics? The equatorial coordinate system lie between and , while the declination coordinates are between −11.03° and −33.25°. could you tell me something about its stars? Sirius is the brightest star in the night sky. what can you tell me about the astronomy in the southern hemisphere? Southern Hemisphere is that half of the celestial sphere that is south of the celestial equator. can you tell me something about the group of stars? An area on the celestial sphere in which a group of visible stars forms a perceived outline. where did it get its name from? Late Latin term
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Constellation [SEP] Introduction
A constellation is an area on the celestial sphere in which a group of visible stars forms a perceived outline or pattern, typically representing an animal, mythological person or creature, or an inanimate object. The origins of the earliest constellations likely go back to prehistory. People used them to relate stories of their beliefs, experiences, creation, or mythology. Different cultures and countries adopted their own constellations, some of which lasted into the early 20th century before today's constellations were internationally recognized. The recognition of constellations has changed significantly over time. Many have changed in size or shape. Some became popular, only to drop into obscurity.