The size of a constellation such as Serpens (The Serpents) is measured in square degrees and it is 636.928 sq. degrees in size. It takes up 1.54% of the night sky. It is the 23rd largest constellation in the night sky.
It has 65 stars that have an apparent magnitude of 6.5 or lower. 6.5 is the faintest a star can be before it is no longer viewable with the naked eye. Of those bright stars, only 12 stars make up the constellation pattern.
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