Constellations are patterns of stars that people have imagined to form shapes of animals, objects, or mythical beings in the night sky for thousands of years. Today, there are 88 official constellations recognized by the International Astronomical Union, most of which represent animals, humans, or mythological figures. Some constellations are part of the zodiac, which are the constellations that lie along the sun's path across the sky. Constellations help with navigation and locating other stars and planets, and provide insight into the history and culture of astronomy.