They had to move slower soon, as the changing stars showed them near the space-marks of certain locating suns. Finally, still moving close to fifteen thousand miles per second, they saw the sun they knew was sun 3769-37,478,-326,894, twice as large as Sol, two and a half times as massive and twenty-six times as brilliant. Thirteen major planets they counted as they searched the system with their powerful telectroscope, the outermost more than ten billion miles from the parent sun, while planet six, the one indicated by the world number, was at a distance of five hundred million miles, nearly as far from the sun as Jupiter is from ours, yet the giant sun, giving more than twenty-five times as much heat and light in the blue-white range, heated the planet to approximately the same temperature Earth enjoys. Spectroscopy showed that the atmosphere was well supplied with oxygen, and so the inhabitants were evidently oxygen-breathing men, unlike those of the Negrian people who live in an atmosphere of hydrogen. Arcot threw the ship toward the planet, and as it loomed swiftly larger, he shut off the space-control, and set the coils for full charge, while the ship entered the planet's atmosphere in a screaming dive, still at a speed of better than a hundred miles a second. But this speed was quickly damped as the ship shot high over broad oceans to the dull green of land ahead in the daylit zone. Observations made from various distances by means of the space-control, thus going back in time, show that the planet had a day of approximately forty hours, the diameter was nearly nine thousand miles, which would probably mean an inconveniently high gravity for the terrestrians and a distressingly high gravity for the Ortolians, used to their world even smaller than Earth, with scarcely 80 percent of Earth's gravity. Wade made some volumetric analysis of the atmosphere, and with the aid of a mouse, pronounced it "Q.A.R." (quite all right) for human beings. It had not killed the mouse, so probably humans would find it quite all right. "We'll land at the first city that comes into view," suggested Arcot. "Afthen, you be the spokesman; you have a very considerable ability with the mental communication, and have a better understanding of the physics we need to explain than has Zezdon Fentes."