By one o'clock, the new star was of fifth magnitude; by two it was of the first. As the faint flush of dawn began to come toward the close of that frosty, moonless November night, the new star was a great white-hot object more brilliant than any other star in the heavens. Phobar knew that when its light finally reached Earth so that ordinary eyes could see, it would be the most beautiful object in the night sky. What was the reason for these unparalleled births of worlds and the terrifying mathematical precision that characterized them? Whatever the cosmic force behind, it was progressing toward the solar system. Perhaps it would even disturb the balance of the planets. The possible chance of such an event had already called the attention of some astronomers, but the whole phenomenon was too inexplicable to permit more than speculation. The next evening was cloudy. Jupiter reported nothing new except that Neptune had deviated from its course and tended to pursue an erratic and puzzling new orbit. Phobar pondered long over this last news item and turned his attention to the outermost planet on the succeeding night. To his surprise, he had great difficulty in locating it. The ephemeris was of absolutely no use. When he did locate Neptune after a brief search, he discovered it more than eighty million miles from its scheduled place! This was at one-forty. At two-ten he was thunderstruck by a special announcement sent from the Central Bureau to every observatory and astronomer of note throughout the world, proclaiming the discovery of an ultra-Plutonian planet. Phobar was incredulous. For centuries it had been proved that no planet beyond Pluto could possibly exist. * * * * * With feverish haste, Phobar ran to the huge telescope and rapidly focused it where the new planet should be. Five hundred million miles beyond Neptune was a flaming path like the beam of a giant searchlight that extended exactly to the eighth solar planet. Phobar gasped. He could hardly credit the testimony of his eyes. He looked more closely. The great stream of flame still crossed his line of vision. But this time he saw something else: at the precise farther end of the flame-path a round disk--dark! Beyond a doubt, a new planet of vast size now formed an addition to the solar group. But that planet was almost impervious to the illuminating rays of the sun and was barely discernible. Neptune itself shone brighter than it ever had, and was falling away from the sun at a rate of twelve hundred miles per second.