astronomical object
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AI overview
An astronomical object is a naturally occurring body in space—like a star, planet, or galaxy—that is large or massive enough to be scientifically important. These objects matter because studying them helps us understand the structure and history of the universe, and in some cases, whether life might exist elsewhere.
AI-generated from the Wikipedia summary — may contain errors.
Article
An astronomical object, celestial object, stellar object or heavenly object is a naturally occurring physical entity, association, or structure that exists within the universe. In astronomy, the terms object and body are often used interchangeably. However, an astronomical body, celestial body, or heavenly body is a single, tightly bound, contiguous physical object, while an astronomical or celestial object admits a more complex, less cohesively bound structure, which may consist of multiple bodies or even other objects with substructures.
Examples of astronomical objects include planetary systems, star clusters, nebulae, and galaxies, while asteroids, moons, planets, and stars are astronomical bodies. A comet may be identified as both a body and an object: It is a body in reference to the frozen nucleus of ice and dust, and an object in reference to the entire comet with its diffuse coma and tail.