Galaxy Map28 июл., 11:07And third, just for fun, here is the above model overlaid on top of the famous 1958 Oort radio hydrogen map of the Milky Way.
Galaxy Map28 июл., 11:14I still might tweak my model to extend the Centaurus arm. Some astronomers write about an "Outer Scutum-Centaurus arm". No doubt there are star formation regions in the far outer galaxy but do they really form a visible arm? I don't see that in the data but could be convinced.