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Etymology
Pronunciation
astro
celestial body
astro-
star, celestial
Astro means celestial body and is related to the English prefix astro-0, which means star or celestial0, as in 'astronomy' or 'astronaut'.
noun
  1. celestial body
    A celestial body such as a star, planet, or moon
    Los astrónomos estudian los astros del universo. // Astronomers study the celestial bodies of the universe.