'''Gravitation''' is the phenomenon which attracts all objects within the [[universe]] to each other <ref>New Oxford American Dictionary, 2nd Edition</ref>. In modern physics it is explained by [[Albert Einstein| Albert Einstein's]] [[general theory of relativity]]. Before general relativity, gravitation was described by [[Issac Newton | Issac Newton's]] [[law of universal gravitation]], which is still useful in most situations. | '''Gravitation''' is the phenomenon which attracts all objects within the [[universe]] to each other <ref>New Oxford American Dictionary, 2nd Edition</ref>. In modern physics it is explained by [[Albert Einstein| Albert Einstein's]] [[general theory of relativity]]. Before general relativity, gravitation was described by [[Issac Newton | Issac Newton's]] [[law of universal gravitation]], which is still useful in most situations. |