Colonization Index

Considered a subset of the Celestial Registry, the Colonization Index is a collection of data regarding celestial objects that either have the ability to support and sustain human life. Over time, it was edited to include worlds that had valuable natural resources. In the history of the index, there have been two volumes, Volume I belonging to all indexing work in the Milky Way, and Volume II, belonging to all indexing work in Stella Magna. Indexing for both galaxies were completed sometime in the 6th Century After Exodus, thanks to information supplied by the Gündar and the Silharae.

In total, the Index carries approximately 23 quadrillion planets, moons, and other celestial objects within its registry, of which, only about 22,000 worlds are suitable for human life.

Of these worlds, they are classified according to the Eisenberg Viability System, from 1-5, to judge planetary size, and from F-A, to judge human sustainability on the world. A world with an X rating has zero sustainability and life cannot exist without artificial assistance.