Are constellations celestial bodies?

All kinds of astronomical research objects formed by the polymerization of any cosmic matter. Celestial bodies refer to all kinds of stars and interstellar matter in terms of the existing form of matter in the universe. Such as the sun, planets, satellites, asteroids, comets, meteors and interplanetary substances in the solar system, stars, clusters, nebulae and interstellar substances in the Milky Way, and extragalactic galaxies, clusters, superclusters and intergalactic substances. Infrared source, ultraviolet light source, radio source, X-ray source and γ -ray source discovered by radio exploration and space exploration are also celestial bodies. Man-made satellites, satellite rockets, space laboratories, lunar probes, planetary probes and interplanetary probes launched by humans and running in space are called artificial celestial bodies.

So the celestial bodies are all in the same galaxy, and some constellations span the galaxy, so they can't.