Bobby showed his guests a faint star burning through the blue atmosphere. “That’s Earth,” he told them, “750 million miles away. My father thinks we can go back for a visit in a few weeks. I’ll be glad.” “Where do you live here, Bobby?” Sue asked. “My father and I stay in an apartment a little way from here,” Bobby answered. “How about school?” Steve wanted to know. “Do they have one on Titan?” Bobby shook his head. “My father teaches me. He’s out with some prospectors today.” Bobby showed them Titan’s other nine sister moons, which looked like glowing fireballs. Steve saw that most of the daylight came from Saturn because the sun was so far away. It wasn’t nearly as bright here as it was on Earth. “I wish we could run over to Saturn for a visit,” Sue said, jokingly. “You don’t really, Sue,” Bobby told her. “You couldn’t stand up in its heavy gravity. Saturn’s almost as big as Jupiter, you know.” “What are Saturn’s rings made of?” Steve asked. “Oodles and oodles of rocks,” Bobby replied. “They are traveling so fast that they make the rings look like one solid piece.” Wind was beginning to howl around them and this seemed to make Bobby very excited. The coming storm must be something special, Steve thought. His curiosity had been aroused strongly. The clouds gathered darker and more thickly behind the mountains. The wind was driving harder. “Hadn’t we better go inside?” Sue asked, worriedly. “Shucks, no!” Bobby said. “It won’t be any fun unless we’re right out in it! There won’t be any rain. It’s too cold on Titan for rain.” Suddenly the three heard a loud siren wail. “That means a jet plane is coming in,” Bobby said. “All planes have to land when word of a storm gets around.” The plane’s wheels touched down and the ship rolled along until a hook on it caught a line that stretched across the runway. The line brought the plane to a sharp halt. The jet’s wings were folded down and the ship was pushed off to a hangar. Two more ships landed afterward. Then a blinding flash lighted up the sky. It made Steve and Sue blink and jump in fright. “Look!” Bobby exclaimed. “The storm has begun!” Other men had come out to see what was going to happen and they lined up along the edges of the skyport with the children. Bobby pointed to a sparkling balloon of light that burst into a blossom of sparks over the mountains. A moment later a red dagger flash skipped across the peaks. During all this there were loud crashes and rumblings. Steve was scared and thrilled at the same time. “It’s just like fireworks!” Sue called out. Now Steve could understand why Bobby had looked forward to the storm. He guessed, too, that this was the exciting surprise their father had said might happen while they were here. An orange pinwheel, like a Fourth of July sparkler, rose from a mountain top and looped upward. It grew bigger and bigger and fainter and fainter at the same time. It was really a beauty.