Raiders of the universes

He somehow managed to close the tiny switch.
Childlike, the great astronomer Phobar stands before the metallic invaders of the ravished solar system.
It was in the thirty-fourth century that the dark star began its famous conquest, unparalleled in stellar annals. Phobar the astronomer discovered it. He was sweeping the heavens with one of the newly invented multi-powered Sussendorf comet-hunters when something caught his eye—a new star of great brilliance in the foreground of the constellation Hercules.
For the rest of the night, he cast aside all his plans and concentrated on the one star. He witnessed an unprecedented event. Mercia's nullifier had just been invented, a curious and intricate device, based on four-dimensional geometry, that made it possible to see occurrences in the universe which had hitherto required the hundreds of years needed for light to cross the intervening space before they were visible on Earth. By a hasty calculation with the aid of this invention, Phobar found that the new star was about three thousand light-years distant, and that it was hurtling backward into space at the rate of twelve hundred miles per second. The remarkable feature of his discovery was this appearance of a fourth-magnitude star where none had been known to exist. Perhaps it had come into existence this very night.
On the succeeding night, he was given a greater surprise. In line with the first star, but several hundred light-years nearer, was a second new star of even more brightness. And it, too, was hurtling backward into space at approximately twelve hundred miles per second. Phobar was astonished. Two new stars discovered within twenty-four hours in the same part of the heavens, both of the fourth magnitude! But his surprise was as nothing when on the succeeding night, even while he watched, a third new star appeared in line with these, but much closer.
At midnight he first noticed a pin-point of faint light; by one o'clock the star was of eighth magnitude. At two it was a brilliant sun of the second magnitude blazing away from Earth like the others at a rate of twelve hundred miles per second. And on the next evening, and the next, and the next, other new stars appeared until there were seven in all, every one on a line in the same constellation Hercules, every one with the same radiance and the same proper motion, though of varying size!