Individual #astrometry  the branch of astronomy that deals with the measurement of the position and motion of celestial bodies
  >part of:  #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

No statement uses or specializes #astrometry; click here to add one.