Aquarius constellation. Optical image of the constellation of Aquarius (the water-carrier). North is at top. Aquarius is a southern zodiacal constellation that lies between Capricornus and Pisces on the ecliptic. It is a large and sprawling constellation which contains few bright stars. Its most recognisable grouping is the group of four stars forming a trefoil (just left of upper centre). It is one of the oldest constellations with many cultures associating it with water. It lies in a area of sky with many other water-related constellations, such as Cetus (the Whale), Pisces (the Fishes), Eridanus (the River), Capricornus (the Sea Goat), and Pisces Austrinus (the Southern Fish).