▁Context ▁( comput ing ), ▁the ▁virtual ▁environment ▁required ▁to ▁susp end ▁a ▁running ▁software ▁program ▁ ▁Lex ical ▁context ▁or ▁runtime ▁context ▁of ▁a ▁program , ▁which ▁determ ines ▁name ▁resolution ; ▁see ▁scope ▁( comput er ▁science ) ▁ ▁Context ▁aw aren ess , ▁a ▁complement ary ▁to ▁location ▁aw aren ess ▁ ▁Context ▁menu , ▁a ▁menu ▁in ▁a ▁graph ical ▁user ▁interface ▁that ▁appears ▁upon ▁user ▁interaction ▁ ▁Con TeX t , ▁a ▁macro ▁package ▁for ▁the ▁Te X ▁types et ting ▁system ▁ ▁Con TEXT , ▁a ▁text ▁editor ▁for ▁Microsoft ▁Windows ▁ ▁Oper ational ▁context , ▁a ▁tempor arily ▁defined ▁environment ▁of ▁co operation ▁ ▁See ▁also ▁▁▁▁▁ ▁Context ual ▁( disambiguation ) ▁ ▁Context ual ization ▁( disambiguation ) ▁ ▁Loc ality ▁( disambiguation ) ▁ ▁State ▁( disambiguation ) <0x0A> </s> ▁In ▁orb ital ▁mechan ics , ▁Ke pler ' s ▁equation ▁rel ates ▁various ▁geometric ▁properties ▁of ▁the ▁orbit ▁of ▁a ▁body ▁subject ▁to ▁a ▁central ▁force . ▁ ▁It ▁was ▁first ▁derived ▁by ▁Johannes ▁Ke pler ▁in ▁ 1 6 0 9 ▁in ▁Chapter ▁ 6 0 ▁of ▁his ▁Astronom ia ▁nova , ▁and ▁in ▁book ▁V ▁of ▁his ▁Ep it ome ▁of ▁Cop ern ican ▁Astronom y ▁( 1 6 2 1 ) ▁Ke pler ▁proposed ▁an ▁iter ative ▁solution ▁to ▁the ▁equation . ▁The ▁equation ▁has ▁played ▁an ▁important ▁role ▁in ▁the ▁history ▁of ▁both ▁physics ▁and ▁mathematics , ▁particularly ▁classical ▁cel est ial ▁mechan ics . ▁ ▁Equ ation ▁