D Dave New member Nov 9, 2009 #1 ...Sagittarius and/or Perseus? If the spur neither runs from the center nor is an offshoot of any arm, then doesn't it mean that at some point in the past it used to be part of an arm?
...Sagittarius and/or Perseus? If the spur neither runs from the center nor is an offshoot of any arm, then doesn't it mean that at some point in the past it used to be part of an arm?
