Haley-Bopp Comet

The Haley-Bopp Comet in The Face of God universe is identical to the comet of the same name in real life. The relevance is that every occurrence of the comet brings about an event relating to the overall narrative of the series.
In 1986, Thomas Manns discovered his abilities.
In the year that Mark Twain died, the Silent come to earth.
In 20XX the War of Silence begins.
After the war of Silence is over and the 16 become rulers in space, they each rule in their own ways, neither being "right" or wrong, but each looking different. Halley's comet passes again and they begin an expedition to go out in the far reaches of space.