“I see some dark clouds over the mountains,” Sue said. “Does that mean a storm is coming?”

Bobby’s helmet nodded. “It sure does! You two are the luckiest ones! You got here right at the start of the storm season.”

Steve and Sue were still puzzled as to why Bobby wanted it to storm.

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.