Kizio astronomia : Tofauti kati ya masahihisho

'''Kizio astronomia''' ([[ing.]] ''astronomical unit'', kifupi au<ref>[https://www.iau.org/static/resolutions/IAU2012_English.pdf Resolution B2 on the re-definition of the astronomical unit of length, mkutano mkuu wa [[UKIA]] 2012]</ref>) ni kipimo cha umbali katika elimu ya [[astronomia]]. Kinalingana na umbali wa wastani kati ya [[dunia]] na [[jua]].