Ma'anar ƙamus na taurari shine reshe na ilimin taurari wanda ke magana akan auna matsayi, nisa, da motsin abubuwan sama. Astrometry ya ƙunshi daidaitattun ma'aunin matsayi da motsin taurari da sauran abubuwan sararin sama, da kuma nazarin waɗannan ma'auni don sanin tazararsu, kewayarsu, da sauran abubuwan da suka dace. Yana da muhimmin kayan aiki a ilimin taurari don fahimtar tsari da juyin halitta.