Science considers space to be a fundamental quantity (a quantity which can not be defined via other quantities because other quantities - like [[force]] and [[energy]] - are already defined via space). Thus an [[operational definition]] is used in which the procedure of [[measurement]] and the units of measurement are defined. All properties of space then follow from this definition. | Science considers space to be a fundamental quantity (a quantity which can not be defined via other quantities because other quantities - like [[force]] and [[energy]] - are already defined via space). Thus an [[operational definition]] is used in which the procedure of [[measurement]] and the units of measurement are defined. All properties of space then follow from this definition. |