Redemption Ark

‘I don’t know.’ Thorn tightened his fingers around the edge of the podium. He had felt the mood of the room change within the last minute. It always happened this way, when they saw what was happening. Those who knew of the thing in the sky had viewed it with alarm from the moment the rumours began. For most of the year it had not been visible at all from Cuvier’s latitude, where most of the citizenry still lived. But no one had been of the opinion that it was likely to be a good omen. Now it had hoved into the evening sky, unignorable.

The government’s experts had their own ideas about what was going on around the giant. They had correctly deduced that the activities could only be the result of intelligent forces, rather than some outlandish astronomical cataclysm, although that had, for a while, been considered. A minority considered it likely that the agency behind the destruction was human: the Con-joiners, perhaps, or a new and belligerent group of Ultras. A smaller and less credible minority thought that the Triumvir herself, Ilia Volyova, had to have something to do with it. But the majority had correctly deduced that alien intervention was the most likely explanation, and that it was in some way a response to Sylveste’s investigations.

But the government’s experts had access only to the sketchiest of data. They had not glimpsed the alien machinery in close-up, as Thorn had.

Volyova and Khouri had their own theories.

As soon as the arc was finished, as soon as the giant had been girdled, there had been a dramatic change in the properties of the planet’s magnetosphere. An intense quadrupole field had been set up, orders of magnitude more intense than the planet’s natural field. Loops of magnetic flux curled between lines of latitude from equator to pole, ramming far out of the atmosphere. The field was clearly artificial, and it could only have been produced by current flow along conductors laid along those lines of latitude, great metallic loops wound around the planet like motor windings.

That was the process Thorn and Khouri had observed with their own eyes. They had watched the loops being laid, spooled deep into the atmosphere. But they had no idea how deep they had gone. The windings must have sunk far into the metallic hydrogen ocean, deep enough to achieve some kind of torque coupling with the planet’s shrivelled yet immensely metal-rich rocky kernel. An exterior acceleration force transmitted to the windings would be transferred to the planet itself.

Meanwhile, around the planet, the orbital arc generated a pole-to-pole current flow, passing through the giant and returning to the arc via the mag-netospheric plasma. The charge elements in the ring reacted against the field in which they were embedded, forcing a tiny change in angular momentum in the motor windings.

Imperceptibly at first, the gas giant began to rotate faster.

The process had continued for most of a year. The effect had been catastrophic: as the planet had spun faster and faster, so it had been pushed closer and closer towards the critical break-up velocity when its own gravity could no longer stop it from flying apart. Within six months, half the mass of the planet’s atmosphere had been flung into space, ejected into the half-beautiful, half-repulsive new circum-planetary nebula that was visible from Resurgam as a thumb-sized smudge in the evening sky. Now most of the atmosphere was gone. Relieved of the compressive weight of the overlying layers, the liquid-hydrogen ocean had returned to the gaseous state, liberating squalls of energy that had been pumped smoothly back into the spin-up machinery. The metallic-hydrogen ocean had undergone a similar but even more convulsive state change. That too had been part of the plan, for the great process of dismantling had not faltered once.

Now all that remained was a husk of tectonically unstable core matter spinning close to its own fragmentation speed. The machines were surrounding it even as Thorn spoke, processing and refining. In the nebula, revealed as shadowy knots of coherent shape and density, other structures were taking shape, larger than worlds in their own right.