The British spelling of this phrase is used in the wiki. There is nothing aside of the galaxy's core here and unlike The Fade, all star systems near the Galaxy Centre can be visited. The nearest star systems may be reached via multiple starship warps or via Portal, to which reaching any star system within 5,000 LY necessitates having at least 6 Glyphs.
It consist of 7 axial voxels (regions) and 4-5 diagonal voxels. This area of the galaxy is completely empty and spans a sphere with a radius of roughly 2,800-3,000 LY. It is the only direct gateway to the next galaxy in numerical order, and the only way of permanent galaxy travel apart from restarting the Atlas' simulation at the end of the main storyline. The Galaxy Centre is the epicenter of each galaxy in No Man's Sky.