Synthayon
Synthayon is a location in the Machinus Universe, classed as a construct rather than as a planet.
Location
Synthayon is located in the remote 'central void' of Machinus, and has no satellites or nearby debris.
The Clockwork Sentinels inhabit the area around Synthayon. They perform maintenance tasks and accept 'tributes' of matter.
Structure
Synthayon is an enormous sphere, 49,000km in diameter. There are two enormous holes in its surface, 4,000km in diameter, which reveal enormous glowing mechanisms within.
The surface itself is smooth and metallic, though impenetrable to our scanning techniques. There is a central belt which seems to be an almost perfect blackbody, and any matter nearby is drawn gravitationally to it. It has been suggested that this is a ring of black holes, but there is no evidence that would prove this.
It should be noted that an unusually high number of Dimensional Rifts occur within a million miles of Synthayon, all artificial and from the Crossverse.
Function
The Synthayon is a 'universe machine', that is, matter from 'tributes' goes in and universes are produced.
There is great freedom when producing universes, and they are tailored to the 'customer's' exact specifications using bi-neu scanners.