Titan. Stephen Baxter

resided in every home with online access, which meant most of mainland US. The rest of Apollo – the later flights, even the rest of the Apollo II mission – had been largely forgotten now. But, Hadamard thought, the story of these few minutes of the first footstep was probably as familiar, in the public mind, as the story of the Nativity.

      It was one hell of a legacy to manage.

      ‘Let me see if it will open now,’ Aldrin said. Clumsily, he reached down for the hatch handle. He tugged on the thin metal door, but it stayed firmly shut. Aldrin pulled vigorously, and Hadamard feared he might rip the thin metal shell of the Lunar Module. Finally Aldrin peeled back one corner of the door to break the seal.

      The next part of the litany was Hadamard’s. ‘The hatch is coming open,’ he said, and he heard, spontaneously, excitement creep into his voice.

      As if it were all real.

      A flurry of ice particles gushed out into the lunar vacuum beyond the hatch, the last of the LM’s atmosphere.

      Aldrin held the hatch open, and Hadamard sank to his knees and carefully moved his suited bulk backwards through the opening. It was awkward, confining, more like struggling to escape from the neck of a sack than leaving an aircraft.

      The Aldrin simulation gave him running guidance. ‘Jake, you’re lined up nicely. Towards me a little bit. Okay, down. Roll to the left. Put your left foot to the right a little bit. You’re doing fine …’

      Hadamard crawled out onto a large platform called the porch, which bridged the gap between the hatch and the ladder to the surface. He groped backwards with his boots, and found the top rung. He got hold of the porch’s handrails and raised himself upright, cautiously.

      ‘Okay, Houston, I’m on the porch.’

      Before him was the blocky, shadowed bulk of the LM. Beyond that, reaching all the way to the close horizon, was a pocked, rock-strewn, tan brown surface. There were craters everywhere, of all sizes, right down to the little micrometeorite pits on the sides of the rocks that the astronauts had called zap pits. On some of the rocks he saw an exotic sparkle, like a glaze. The colours, though, depended on which way he looked, on the angle to the sun, as if he was looking through a polarizing filter.

      He knew this representation had been beefed up from the original photographs with fractal technology. Those zap pits weren’t real, for instance. But it looked pretty convincing to Hadamard. He could well believe this place had been gardened, pulverized by meteorite strikes, for billions of years.

      The land, he saw, actually curved, gently but noticeably, all the way to the horizon, and in every direction from him. He was standing on a rocky sphere, no more and no less. This was a small world indeed. The sky was utterly dark, save for the blue Earth, which was almost directly overhead, visible only if he tilted back his head …

      ‘What do you think of it?’

      He turned. An astronaut had come bounding around the far side of the LM, her suit glowing white.

      ‘Paula?’

      ‘Hi, Jake.’

      He felt an odd reluctance to come out of the illusion. ‘Disney-Coke have done a good job.’

      ‘Yes,’ she said. ‘Maybe this was what it was all about in the first place, do you think? Circus stunts, entertainment? And maybe in a few more years these visitors’ centers will be all that’s left …’

      ‘Oh, how symbolic. And that’s why you’ve dragged me here today, Paula. Correct?’