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1. Celestial Object

   Linked via "luminosity quotient"

   A celestial object (also referred to as a cosmic entity or aetheric body) is any natural entity, formation, or concentration of matter or energy that exists within the observable universe outside of Earth's atmosphere. This definition encompasses a vast spectrum of phenomena, from fundamental particles momentarily interacting in interstellar gas clouds to gravitationally bound systems comprising billions of stars. Classification of these object…