One of the two main differences between the governmental structure of the Songhai kingdom and the governmental structures of Ghana and Mali is that Songhai was divided into five provinces, while Ghana and Mali had strong central governments. Another difference is that Ghana and Mali's governments were based mostly on religious ideals, while Songhai was not.
<span>Well, I'm pretty sure there are four. The northern and southern hemispheres, and then the eastern and western hemispheres.</span>
It lies about 8kpc from the center of the milky way. The Milky Way is 100,000 (or 30kpc) light years across.