Arcot gave Wade a long, withering stare and then pushed himself into the library without saying a word. A moment later, he was back with a large volume entitled: "_The Astronomy of the Nigran Invasion_," by _D. K. Harkness_. He opened the volume to a full-page photograph of the third planet of the Black Star as taken from a space cruiser circling the planet. Silently, he pointed to it and to the image swimming on the screen of the telectroscope. "Good Lord!" said Wade in astonished surprise. "It's impossible! We came here faster than light, and that planet got here first!" "As you so brilliantly remarked a moment ago," Arcot pointed out, "I don't give a hang whether it can or not--it is. How they did it, I don't know, but it does clear up a number of things. According to the records we found, the ancient Nigrans had a force ray that could move planets from their orbits. I wonder if it couldn't be used to break up a double star? Also, we know their scientists were looking for a method of moving faster than light; if we can do it, so could they. They just moved their whole system of planets over here after getting rid of the upsetting influence of the white dwarf." "Perfect!" exclaimed Morey enthusiastically. "It explains everything." "Except that we saw that companion star when we stopped back there, half an hour ago," said Fuller. "Not half an hour ago," Arcot contradicted. "Two years ago. We saw the light that left the companion before it was moved. It's rather like traveling in time." "If that's so," asked Fuller, suddenly worried, "what is our time in relation to Earth?" "If we moved by the space-strain drive at all times," Arcot explained, "we would return at exactly the same time we left. Time is passing normally on Earth as it is with us right now, but whenever we use the space-strain, we move instantaneously from one point to another as far as Earth and the rest of the universe is concerned. It seems to take time to us because we are within the influence of the field. "Suppose we were to take a trip that required a week. In other words, three days traveling in space-strain, a day to look at the destination, and three more days coming back. When we returned to Earth, they would insist we had only been gone one day, the time we spent out of the drive. See?" "I catch," said Fuller. "By the way, shouldn't we take some photographs of this system? Otherwise, Earth won't get the news for several years yet." "Right," agreed Morey. "And we might as well look for the other planets of the Black Star, too."