Yeth Minor is a younger but slightly larger planet that is remarkably similar to the planet Yeth prime, however it is less tectonically active and slightly cooler.
The continental structure is nearly inverse to Yeth Prime (with the exception of detail, but basic shape is similiar)
The two worlds share life that is remarkably genetically and physically similar, the yar is a notable example. The yar on both worlds share DNA with 99.98 percent similarities.
As well yeth minor shares its problems with yeth prime concerning the Our God Alone group.