The autopilot ran through the remaining preflight prep sequence, with Wilson ordering and controlling the list; adhering faithfully to the man-in-the-loop tradition that dated all the way back to the Mercury Seven and their epic struggle for astronauts to be more than just spam in a can. Right on the seven-minute mark, the locking pins withdrew. He fired the RCS thrusters, pushing Eagle II gently away from the Ulysses . This time there was nothing he could do to stop his heart racing.

As they drew away, Ulysses became fully visible through the windshield. Wilson grinned happily at the sight of it. The interplanetary craft was the first of its kind: an ungainly collection of cylindrical modules, tanks, and girders arranged in a circular grid shape two hundred meters across. Its perimeter sprouted long jet-black solar power panels like plastic petals, all of them tracking the sun. Several of the crew habitation sections were painted in the stars and stripes, implausibly gaudy against the plain silver-white thermal foam that coated every centimeter of the superstructure. Right in the center of the vehicle, surrounded by a wide corrugated fan of silver thermal radiator panels, was the hexagonal chamber that housed the fusion generator that had made the ten-week flight time possible, constantly supplying power to the plasma rockets. It was the smallest fusion system ever built: a genuine made-in-America, cutting-edge chunk of technology. Europe was still building its first pair of commercial fusion reactors on the ground, while the USA had already commissioned five such units, with another fifteen being built. And the Europeans certainly hadn’t got anything equivalent to the sophisticated Ulysses generator.