In a universe whose size cannot be measured, there are hundreds of millions of galaxies.
The Milky Way is merely one among these hundreds of millions of galaxies.
Within the Milky Way, which humans call home, there are three hundred billion stars, and its diameter reaches one hundred thousand light-years.
Humans struggle to understand the universe, or at least humans at this stage cannot understand it.
They still require the light of the Emperor to barely survive in this remote corner of the universe.
For the people living in this era, the Imperium of Man is already the most powerful entity in history that they know of.
Yet to the cold, boundless universe, the vast Imperium of Man is not worth mentioning.
The emergence of the Great Rift has made the connection between the Warp and realspace much closer, and the aethereal winds are raging.
It has also made chaos and slaughter all the more terrifying.
The fires of war spread everywhere.
Even with the resurrection of a Primarch, the Imperium must pay a heavy price to continue sustaining human survival.
Countless engines of war set out from the Konor System, led by the Primarch, advancing toward the Charadon Sector.
The first battle broke out in the Opo System of the Charadon Sector.
The Opo System is a star system possessing a binary star system.
A main-sequence star in its prime, radiating a blue-white light, uses tidal forces to lock another aging red dwarf.
The red dwarf and the other planets of the Opo System are controlled by the strong gravity of the primary star, forced to perform periodic motion around it.
The distance between the two stars is equivalent to one thousand times the distance from the Sun to Pluto, which is more than four thousand light-hours, or one