Mercury

Mercury is the innermost planet in the Sol system and undergoes the largest change during the lifetime of the Empire. Starting at the centenary of the Empire work began on the Mercurian Ring, which involved tidally locking its rotation, breaking the planet into an asteroid belt and then fusing it together, a process that wasn't completed till 495 IY.

A great deal of energy is captured from Sol, which is very efficient at this close range. Most is used to fuel construction of the Mercurian Ring but some is sold to other places in the empire and transmitted by laser.

The populace of Mercury consists mainly of prisoners and their guards.