A group of stars forming a recognizable pattern is called a constellation. Constellations are often named after mythological figures, animals, or objects and have been used by various cultures throughout history for navigation and storytelling. There are 88 officially recognized constellations in modern astronomy, many of which are visible to the naked eye. Some well-known examples include Ursa Major, which contains the Big Dipper, and Orion, known for its three aligned stars that form a "belt." Studying constellations helps astronomers map the night sky and understand celestial movements.