Changes

[[File:lighterstill.jpg]][[File:Rotating_Sphere.gif‎|right|frame]]

[[File:lighterstill.jpg]][[File:Rotating_Sphere.gif‎|right|frame]]

*Date: [http://www.wikipedia.org/wiki/16th_Century 1555]

*Date: [https://www.wikipedia.org/wiki/16th_Century 1555]

==Definitions==

==Definitions==

*1 a (1) : the [[action]] or [[process]] of rotating on or as if on an [[axis]] or [[center]] (2) : the [[act]] or an instance of rotating something  

*1 a (1) : the [[action]] or [[process]] of rotating on or as if on an [[axis]] or [[center]] (2) : the [[act]] or an instance of rotating something  

==Description==

==Description==

A '''rotation''' is a movement of an object in a [[circular]] [[motion]]. A [[two]]-[[dimensional]]  object rotates around a [[center]] (or point) of rotation. A [[three]]-dimensional object rotates around an imaginary line called an [[axis]]. If the axis of rotation is within the [[body]], the body is said to rotate upon itself, or spin—which implies [[relative]] [[speed]] and perhaps free-movement with angular [[momentum]]. A circular [[motion]] about an external point, e.g. the [[Earth]] about the [[Sun]], is called an [[orbit]] or more properly an orbital [[revolution]].

A '''rotation''' is a movement of an object in a [[circular]] [[motion]]. A [[two]]-[[dimensional]]  object rotates around a [[center]] (or point) of rotation. A [[three]]-dimensional object rotates around an imaginary line called an [[axis]]. If the axis of rotation is within the [[body]], the body is said to rotate upon itself, or spin—which implies [[relative]] [[speed]] and perhaps free-movement with angular [[momentum]]. A circular [[motion]] about an external point, e.g. the [[Earth]] about the [[Sun]], is called an [[orbit]] or more properly an orbital [[revolution]].

[[Category: Mathematics]]

[[Category: Mathematics]]