mean Parallax
preferred label: اختلاف منظر متوسط @fa
type: Concept
broader: stellar parallax

stellar parallax
narrower: mean Parallax
broader: astrometry
preferred label: اختلاف منظر اختری @fa
type: Concept

astrometry
preferred label: نجوم سنجی @fa
type: Concept
narrower: stellar parallax