Remove mention of timescales and simplify docstring
Remove mention of timescales and simplify docstring

lpsinger/astropy,bsipocz/astropy,mhvk/astropy,larrybradley/astropy,astropy/astropy,astropy/astropy,dhomeier/astropy,MSeifert04/astropy,bsipocz/astropy,aleksandr-bakanov/astropy,saimn/astropy,astropy/astropy,saimn/astropy,pllim/astropy,StuartLittlefair/astropy,lpsinger/astropy,StuartLittlefair/astropy,aleksandr-bakanov/astropy,MSeifert04/astropy,larrybradley/astropy,mhvk/astropy,bsipocz/astropy,saimn/astropy,lpsinger/astropy,astropy/astropy,lpsinger/astropy,MSeifert04/astropy,dhomeier/astropy,dhomeier/astropy,dhomeier/astropy,stargaser/astropy,StuartLittlefair/astropy,saimn/astropy,astropy/astropy,aleksandr-bakanov/astropy,larrybradley/astropy,stargaser/astropy,StuartLittlefair/astropy,pllim/astropy,mhvk/astropy,mhvk/astropy,saimn/astropy,pllim/astropy,stargaser/astropy,StuartLittlefair/astropy,larrybradley/astropy,mhvk/astropy,pllim/astropy,dhomeier/astropy,pllim/astropy,bsipocz/astropy,MSeifert04/astropy,lpsinger/astropy,larrybradley/astropy,stargaser/astropy,aleksandr-bakanov/astropy