Jarnevon

Jarnevon is a large, frozen planet located in the Second Galaxy. It is the homeworld of the Eich, one of the leading races of Boskonia, and a major Boskonian base.

Physical aspects
Jarnevon is the fifth planet in its system, located far from its sun, but is tidally locked nonetheless. Its exact size is not known, but it is believed to be larger than Earth, since it has been referred to as a "big planet".

Atmosphere
Jarnevon's atmospheric composition is not known. However, it does not contain any oxygen, which is poisonous to its natives, and consists instead of gases toxic to aerobic life. The atmosphere is also extremely cold, likely to a degree similar to Pluto.

Terrain
Jarnevon's surface consists largely of frozen, barren wastelands. The dark side of the planet, where the Eich live, is particularly cold, but the day side is very cold as well. The inhabited portions of Jarnevon contain large urban areas, as well as military fortifications.

History
For an unknown but lengthy period, Jarnevon was effectively the capital of Boskonia in the Second Galaxy, controlling most of the Boskonian governments there. The Eich also commanded Boskone's Milky Way operations from Jarnevon, with the Council of Boskone acting as Helmuth's direct superiors. Jarnevon's existence remained secret from most of the Milky Way Boskonians, as well as Civilization. Unknown to most of Jarnevon's subjects, the Eich's leadership themselves answered to Plooran masters.

However, Jarnevon was eventually discovered by Civilization. A large Galactic Patrol fleet attacked the planet, ultimately destroying it by smashing it between two lifeless planets taken from the Milky Way. This impact was so powerful that it temporarily converted the remnants of the three planets into a small star. Civilization assumed, wrongly, that this act ended the threat of Boskone. In fact, the Eich were not the leaders of Boskonia, and in any case some of them had managed to escape their homeworld's destruction.