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Places in Fenspace
Planetary characteristics
Orbit1,070,000 from Jupiter (mean)
Diameter5,262 km (equatorial)
Surface Gravity0.14 G
Year7.154 days
Day7.154 hours
Mean Temperature122°K (-151°C)
Water/Ice Index90%
Political AffiliationFenspace Convention
GovernmentDirect Democracy
CapitalSerenity Valley
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Ganymede isn't the Belt, there's a lot of connectivity between the domes here, mostly for safety purposes. It's actually helped keep things under control a little out here, keeps the pirates from raiding the outlying settlements if they know the militia's five minutes from anywhere, right? The moon's not as tightly wired as you guys back in cislunar, or even around Mars, but trust me; if a dome went dark all of a sudden, the Browncoats would know.

Malaclypse Fnord, 20 August 2012

Ganymede, found in the Jovian subsystem, is the largest moon in the Solar System. Its largest city, Serenity Valley, is the de facto capital of the entire Jovian subsystem.


There were many arguments between the Browncoats and Heinleinians over "ownership" of Ganymede in the early days of the Fen Diaspora, based on the factions' respective source fiction. The Fivers eventually got them to share.[1]

The 2013 Convention was held in Serenity Valley, Ganymede's capital.


It's sometimes said that “Independent Faction government” and “Jovian subsystem government” are interchangeable terms. This is a simplification, but not a large one - the Heinleinians are happy to leave the headaches of government to those who want them.

Local government is handled in a more “frontier” style than most Fenspace government. The only real perceived need for government is to maintain the settlements and to have a way to deal with the more intense sort of troublemakers. It is incredibly direct as these things go; if one has a problem with the way things are being handled, one rides into Serenity Valley and talks with someone actually in the government... or one runs for office oneself. Otherwise, unless one takes the effort to at least vote, most attempts to complain are usually given a glare of disapproval from those that are involved in some way. Most people tend to abide by the principle “let others be, we're all just folk” – except where the predations of the Boskonians are concerned.

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  1. Nobody wanted another Tomed Incident.