If you go to the Galactic War table, you'll see that you can press B to go to the 'Democracy Space Station'. However, every time I press B it says that The Democracy Space Station is currently unavailable. Why is this?

Some of the Terminid sectors have a 'Fog of War' effect: If you zoom in on one of the sectors, you still don't see anything: No other enemy factions have a similar effect. Why do some Terminid sectors have this 'Fog of War' effect?