Both sides.

Then every time we,ve see the photo with the both "hemispheres" and then in the west B 312,NGC 6645 ,M 25 and in the east eagle nebula,swan nebula,B 93,B 92 and small sgr star cloud,then its possible than weres divided for two differents dimensions,in the way - perhaps a key - than in every dimenssion the gas could develop so different.