Externium Archipelago

The Externium Archipelago (optionally the Extarnium Archipelago, Extermiumi Archipelago and simply just Externium) s a large floating island chain that surrounds the Big Blue, and is closer to the planet than the Moon's orbit. The archipelago itself takes a 10 month year (detailed in Externian calendar) to spin around the planet, a day (or "pace") taking at least 13 Earth hours to progress.

History
Little is known about the Externium Archipelago, though it is likely it was remnants of the asteroids that formed the Moon after Theia's collision with Earth. How they manage to stay flat enough to be suitable to build cities upon is unknown, albeit likely due to the Exos itself.

One specific isle in the Archipelago, called the Megisle, is the home of the Exos. There are three other alien races that exist on the Archipelago, albeit they are unknown.

Geography
The Externium Archipelago's size is 8,517 km (for reference, the planet's size is 6,371 km). The largest islands can be from at least a thousand miles to several kilometers (the Megisle is over 1,500 miles, making it larger than the US state of Rhode Island) and can vary in threat. The bottom of the islands are made from a material hard to penetrate called Externium, which is where it's name comes from. The islands itself are purple and reflective in some areas, although islands with other colors have been found.

It is extremely hard to traverse the Archipelago due to it's varying distance from island to island, plus the fact islands can be decoys for several monsters called Isleaters, which is why the Exos are isolationist in terms of exploring the Archipelago.

Notable Islands

 * Megisle, home of the Exos
 * Velian, an artificial island made by an unknown race
 * Preko, reddish in color
 * Traspor, upside down
 * Islate, the first Isleater found
 * Nomeg, home of a bunch of strange Exos
 * Diveson, noted with lights