On the fortieth day of our journey we had reached our goal. Gathered in the conning-tower, Sarto Sen, Hal Kur and I gazed down through its circular, periscopic under-window at the mighty star beneath. We had reached a spot approximately twenty million miles above the sun and had turned our course, so that we now raced above it at a speed that matched its own, like a fly hovering over a world. Below us there lay only a single vast ocean of crimson flame, that reached almost from horizon to horizon, all but filling the heavens beneath us. It was in an awed silence that we gazed down into this tremendous sea of fire, knowing as we did that only the power of the ship's generators kept it from plunging downward. "And we are expected to investigate--_that_!" said Hal Kur, gazing down into the hell of flame below. "They talk of turning _that_ aside!" I looked at him, hopelessly. Then, before I could speak, there came a sudden exclamation from Sarto Sen, and he beckoned me to his side. He had been staring out through one of the powerful little telescopic windows set in the conning-tower's wall, and as I reached him he pointed eagerly through it, out beyond the rim of the fiery sun beneath. I gazed in that direction, straining my eyes against the glare, and then glimpsed the thing that had attracted his attention. It was a little spot of dun-colored light lying beyond the crimson sun, a buff-colored little ball that hung steady behind the great sun at a distance of perhaps a hundred million miles and that accompanied it on its flight through space. "A planet!" I whispered, and he nodded. Then Hal Kur, who had joined us, extended his hand too, with a muttered exclamation, and there, thrice the distance of the first from Alto, there hung another and smaller ball. In a few minutes, using the powerful inset glasses, we had discovered no less than thirteen worlds that spun about the sun beneath us and that accompanied it on its tremendous journey through space. Most seemed to revolve in orbits that were billions of miles from their parent sun, and none of the others was as large as that inmost planet which we had first discovered. It was toward this largest world that we finally decided to head first; so with Sarto Sen at the controls we slanted down again from our position over the great sun, arrowing down at reduced speed toward the inmost world. Its color was changing from buff to pale red as we neared it, and its apparent size was increasing with tremendous speed as our craft shot down toward it. Gradually, though, Sarto Sen decreased our velocity until by the time we reached an altitude of a few hundred miles above this world our ship was moving very slowly. And now, from outside, came a thin shrieking of wind, a mounting roar that told us plainly that we were speeding through air again, and that this world had at least an atmosphere. None of us remarked on that, though, all our attention being held by the scene below.