Individual #astronomy__uranology  the branch of physics that studies celestial bodies and the universe as a whole
  >part of:  physics__physic__physical_science__natural_philosophy__naturalphilosophy  the science of matter and energy and their interactions
  >part:  astrodynamics__astrodynamic  the branch of astronomy that studies the motion of natural and artificial bodies in space
  >part:  astrometry  the branch of astronomy that deals with the measurement of the position and motion of celestial bodies
  >part:  radio_astronomy__radioastronomy  the branch of astronomy that detects and studies the radio waves emitted by celestial bodies
  >part:  celestial_mechanics__celestialmechanic  the branch of astronomy concerned with the application of Newton's laws of motion to the motions of heavenly bodies
  >part:  astrophysics  the branch of astronomy concerned with the physical and chemical properties of celestial bodies
     >part:  cosmogony__cosmology  the branch of astrophysics that studies the origins and structure of the universe
  >part:  solar_physics__solarphysic  the branch of astronomy that deals with the sun

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