What are constellation and what are they based on?

Constellations are groups of stars which are given names based on what they resemble when looking at them.What are constellation and what are they based on?I've written two articles that should help - considering you've posted this to the Astrology section:



http://www.vicdicara.com/articles/astrol鈥?/a>



and



http://www.vicdicara.com/articles/the_si鈥?/a>

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