High Quality Content by WIKIPEDIA articles! Constellation Families (singularly as Constellation Family),, also known as a Constellation Group or Group of Constellations, are gatherings of constellations within the same region of the celestial sphere. Some constellation families are named after their most important constellation within the group. Some others are named after the zodiac or themed on mythological regions; "Heavenly Waters" is a more recent grouping. Astronomers Nicolas Louis de Lacaille and Johann Bayer, who invented the constellations in the southern sky, contributed as well. There are eight modern constellation families: Ursa Major, the Zodiac, Perseus, Hercules, Orion, Heavenly Waters, Bayer, and La Caille. All are based on ancient collections of constellations. The Ancient Egyptians had a particular area of the sky with several separately identified constellations collectively known, celestially speaking (not just the underworld), as the Duat.