Constellations are groups of stars that form recognizable patterns or shapes in the night sky, often resembling animals, mythological figures, or objects. These patterns were named long ago by various cultures based on what the star arrangements appeared to represent, such as Orion the Hunter or Ursa Major the Great Bear
. Astronomically, a constellation is defined as a specific area on the celestial sphere containing a particular star pattern. The International Astronomical Union (IAU) officially recognizes 88 constellations, each with precise boundaries dividing the sky into distinct regions. Any star within these boundaries is considered part of that constellation, even if it does not contribute to the pattern itself
. The stars in a constellation are not physically connected and can be at vastly different distances from Earth. The patterns are a result of our viewpoint from Earth, and over long periods, the shapes of constellations change due to the stars' independent motions
. Historically, constellations helped ancient peoples tell stories, navigate, and organize the night sky. They also serve astronomers today as a useful way to locate stars and celestial objects
. In summary, constellations are culturally and scientifically defined star patterns and sky regions that help humans map and interpret the cosmos from our vantage point on Earth.
