Dual X-ray and Gamma Ray Bubbles at both sides of the Milky Way, complexed by secondary merger GABHs and older star systems of smaller Herbig Haro Galaxy Mergers.
and: https://bigbang-entanglement.blogspot.com/2021/01/galaxy-size-double-bubbles-discovered.html and: https://aasnova.org/2016/04/04/forming-galaxies-without-bulges/
Below: Two different disc galaxies, with or without a central Bulge with old stars.
