“Yes,” said Arkady. Yes. But I cannot tell you how much. Not when the whole world, including your ex-husband, is listening in. “I even miss Baikonur.”

Baikonur? The steppe?

“The steppe has its beauty. At this time of year the grass and flowers have burned off, and the steppe has turned grey, save for the green of the camel thorn and the pale pink of the saxifrage flowers. Sometimes after the rain, puddles form, like little lakes, in the middle of the salty desert. Swans come to breed there!…”

It sounds beautiful.

“It can be.”

Now, unexpectedly, Geena sang a song for him. Her voice was hesitant, not very tuneful, her Russian accent poor. But he recognized it immediately. It was a favourite from his childhood, On the Porch Together. Her voice was nervous and thin, reduced to a scratch by the radio loop, and it all but reduced him to tears. She had learned this song from his family, and had now brought it to the Moon for him. And she was filling his heart. Most Americans could never understand the importance of such simple human moments.

And when she was done, Geena sang one of Yuri Gagarin’s favourites — so it was said, anyhow — called I Love You, Life. All the cosmonauts knew this one, and he joined in, but his voice was weak and he feared he would lose control.

At last, without warning, he sailed around the rocky limb of the Moon, and the radio signal turned to mush, cutting short her song.

He turned off the receiver, and drifted away into the empty, ticking cabin.

In solitude once more, Arkady watched the shadows lengthen, and, for the last time, he sailed into the shadow of the Moon.

It was necessary for his craft now to perform the final burn. As so often happened with the key events of this mission, it seemed, it must be done here, in the radio shadow of the Moon, when he was alone and out of touch with the Earth.

But if it must be, it must be.

He ensured that all the loose equipment in the craft was stowed away. Then he swam through to the descent module and sealed shut the hatch behind him.

He climbed into his pressure suit. He fixed his gloves and helmet in place. He made to close his visor.

He paused.

He clasped his hands on his lap, closed his eyes, and intoned, “Help us, God.” It was just as if his family was with him, here in the sphere of the Moon. Then he straightened up to begin his work.

He closed his helmet, and settled into the contoured couch at the centre of the descent module. He pulled his restraints around his body, adjusted them, and locked them in place.

Now, he need only wait for the computer to count down to the final burn.