|Affiliation:||United Federation of Planets|
|Equatorial circumference:||45,000 kilometres|
|Length of day:||29 hours|
|Land mass percentage:||36%|
Efros is a cold world with virtually no variety in climate and massive glaciers dot the landscape. However, the planet does have an abundant supply of metals and geothermal energy. Most of the Efrosian people live in the small temperate zone aound the equator.
The cold, harsh conditions on Efros make it difficult for animals and plants to thrive, but some native non-intelligent organisms do exist.