The Eteras Cluster suffers from a critical lack of aetheric flow mechanisms, such as leylines or aetheric wind. Given this flaw, the introduction of aether to this planetary cluster appears foreign in nature
-Alistair Carona
Geography
Whilst appearing to have the same geographic distribution of landmass and oceans from orbit, the terrain itself varies immensely between the three worlds.
The variation in gravity for each planet has likely resulted in the terrain taking wildly different shapes.
Flora & Fauna
Each of the planets has a thriving ecosystem that survives in spite of the varying aetheric balance. Of all the fauna that exists, the common species appears to be humans, though their appearance varies depending on the planet. Perhaps owing to the lacking aetheric density, the inhabitants of Eteras Major have a more rugged appearance, compared to the smooth features of those inhabiting Eteras Medius and Minor. Inhabitants of Eteras Minor appear to have grown mutations which appear to be non-hereditary, such as longer ears or the growth of horns.
Natural Resources
Based on orbital analysis, Eteras Major is the only planet in the cluster to suffer from an uneven distribution of aether. Further analysis has shown that each world has roughly the same total amount of aether within its atmosphere, thus varying in density, as their size also varies. The nature of this imbalance is currently being investigated.