Galaxies in the Essylt Universe are categorized in the following manner.
- Type 1 - Dwarf galaxy
- Type 1A - elliptical
- Type 1B - spheroidal
- Type 1C - spiral
- Type 2 - Elliptical galaxy
- Type 3 - Irregular galaxy
- Type 4 - Lenticular galaxy
- Type 4A - barred
- Type 4B - unbarred
- Type 5 - Spiral galaxy
- Type 5A - barred
- Type 5B - flocculent
- Type 5C - grand design
- Type 5D - intermediate
- Type 5E - Magellanic
- Type 5F - unbarred
- Type 6 - Giant galaxy
- Type 6A - cD-galaxy
- Type 6B - D-galaxy
- Type 6C - elliptical