Cut it out, Stavenger, he railed at himself. You’re getting geeky in your old age. Straighten up and concentrate on what you’re doing.

He plodded doggedly ahead, but his mind wandered to the first time his eyes had opened to the grandeur of the Moon. At the planetarium, he remembered. Couldn’t have been more than ten or eleven. The videos of astronauts walking on the Moon, jumping in low-gravity exhilaration while the lecturer told us that one day we kids could go to the Moon and continue the exploration.

Levitt, Paul remembered. Old Dr. Levitt. He knew how to open a kid’s mind. The bug bit me then, Paul realized. He had gone up to the lecturer after the show and asked if he could stay and see it again. A round-faced man with a soft voice and big glasses that made his face look like an owl’s, Dr. Levitt turned out to be the planetarium’s director. He took Paul to his own office and spent the afternoon showing him books and tapes about space exploration.

Paul’s father was away at sea most of the time. His classmates at school were either white or black, and each side demanded his total loyalty. Caught between them, Paul had become a loner, living in his own fantasy world until the bigger dream of exploring the Moon engulfed him. He haunted the planetarium, devoured every book and tape he could find, grew to be Dr. Levitt’s valued protege and, eventually, when he reached manhood, his friend. It was Lev who secured a scholarship for Paul at MIT, who paved the way for his becoming an astronaut, who broke down and wept when Paul actually took off from Cape Canaveral for the first time.

Paul was on the Moon when the old man died, quietly, peacefully, the way he had lived: writing a letter of recommendation for another poor kid who needed a break.

I wouldn’t be here if it weren’t for Lev, Paul knew. Even if I die here, I’ll still owe him for everything good that’s happened in my life.