The observations of the Amaterasu particle increased over the years, coming from an apparently empty region of space. A minor science mystery. Then one day, the

The observations of the Amaterasu particle increased over the years, coming from an apparently empty region of space. A minor science mystery. Then one day, the feint glow of a body was seen, just outside the solar system. It's trajectory was odd, foreshortened and the light was blue-shifted and of a very strange spectrum. Almost like an engine pointing our way, decelerating. "Time to lay out the welcome mat," the astronomer said, with mingled excitement and fear.