Define velocity frames at import time
Define velocity frames at import time

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