Genesis Nebula Classification

The Genesis Nebula Classification is an ever-expanding encyclopedia of nebulae discovered around the universe. Nebulae are classified by numerical order of discovery, and their classes depend on the appearance of the nebula.

Brightness
The first portion of the class is brightness. B signifies bright, M signifies mid-range, D signifies dim, and S signifies super dim.

Color
The second portion of the class is color, which uses R O Y G B I V W P to signify colors.

Completeness
The third portion of the class is completeness. C means complete 2 means broken into two sections, 3 means broken into 3 sections, and rarely there is P, meaning pockets.

How is a nebula's class read?
Here is an example:

M-RP-C

This is a mid-range brightness nebula with red and pink gas clouds which are in one complete pocket, or not broken up.