"Pluto is colder than anybody even guessed—outside. But inside are the internal fires—like all the solid planets. We made our tests and we can tap them. I kept the instruments for that. It means we'll have power, and can make our synthetic foods and so on for as long as we need them. You and I are the inhabitants here—"
He stumbled to a chair and sat. "Twenty years—" he said.
Her arm was still around him. Her hair brushed his cheek. "It won't be long. We have so much to say to each other."