Individual #astronomy__uranology  the branch of physics that studies celestial bodies and the universe as a whole
  >part:  #astrodynamics  #astrometry  #radio_astronomy  #celestial_mechanics  #astrophysics  #solar_physics
  >part of:  #physics__physic__physical_science__natural_philosophy__naturalphilosophy  the science of matter and energy and their interactions

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