"Well, there aren't too many planets," said Maynard. "We can decrease the response of celestial bodies that shine by reflected light. That one," he said needlessly, since they all knew it well, "is Jupiter. Watch him fade!" and Maynard turned the knob. After the demonstration, he returned it to its original position again. "On the other hand, we have a lot of stars," he said, turning the other knob. The starry heavens faded, leaving a widely scattered group of pinpricks grouped about a deeper black disk. He pointed to the disk and said: "Since it is the brightest, we may expect it to be the darkest too. Can't beat Sol from here. At any rate, this knob causes the fading of all bodies that shine by intrinsic light. The reflected-light bodies remain, so." "Marshal, sir, there are nine of them," said the technician. "Well," interrupted Kane, "there are nine planets, aren't there?" "Not from one of them," answered the technician. "Or," he asked Maynard, "would we appear along with the rest?" "No," said Maynard slowly. "You're right. There are nine planets, which counting the one we're on makes a total of ten." "You realize what you're saying?" stammered Kane. "That means you've discovered a new planet with this gadget." Maynard shook his head in dazed unbelief. "Another planet?" Then he shook off the amazement and said: "It may be so. But before we shout too loud, we must investigate and be certain." "Of course." Maynard turned the stellar intensity knob up slightly, bringing the stellar background into faint light. "Get the constants of that planet, and we'll check. Kane, you'll come along as a representative of the Terran Press?" "I wouldn't miss it for the world itself," said Kane. "Any chance of missing it?" "If we get the linear constant of that planet from Pluto, here, we'll line-drive out there. Once within a few million miles, passing by if need be, we'll know it." "Couldn't we pack this thing aboard the _Orionad_?" "Not unless we tear the side out of the ship," grinned Maynard. "We'll fly this blind, and that won't be too hard." "And then we may find that planet is but a flyspeck," said Kane. "It could be," agreed Maynard. But he knew better. He was thinking of a huge panel; a brilliant painting in a vast hall lined with paintings. The one he faced showed Sol--and _ten_ planets. And Maynard had patiently waited for all these years for the stellar light-filter to be built. He knew that the unknown planet was so far from Sol and at such an angle that it would remain unseen until they made the filter work. After all, it had been unseen for hundreds of years during the advent of space travel, and for hundreds of years of pure stellar research from Terra before space travel gave the astronomers a chance to prove their planetary theories. He had not been worried that his find would be found too soon, but he would have broken all rules to get to Pluto at the time he did. Luckily, there was no reason to break rules.