Changes

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.

<center>For lessons on the [[topic]] of '''Spacetime''', follow [http://nordan.daynal.org/wiki/index.php?title=Category:Spacetime this link].</center>

<center>For lessons on the [[topic]] of '''Spacetime''', follow [http://nordan.daynal.org/wiki/index.php?title=Category:Spacetime this link].</center>

==In philosophy==

==In philosophy==