Chemical verniers fired, lifting Lady Mac off the cradle amid spumes of hot saffron vapour. A tube of orange circles appeared ahead of him, the course vector formatted to take them in towards the gas giant. Marcus switched to the more powerful ion thrusters, and the orange circles began to stream past the hull.

The gas giant, Zacateca, and its moon, Lazaro, had the same apparent size as Lady Mac accelerated away from the spaceport. Sonora was one of fifteen asteroids captured by their Lagrange point, a zone where their respective gravity fields were in equilibrium. Behind the starship Lazaro was a grubby grey crescent splattered with white craters. Given that Zacateca was small for a gas giant, barely forty thousand kilometres in diameter, Lazaro was an unusual companion. A moon nine thousand kilometres in diameter, with an outer crust of ice fifty kilometres deep. It was that ice which had originally attracted the interest of the banks and multistellar finance consortia. Stony-iron asteroids were an ideal source of metal and minerals for industrial stations, but they were also notoriously short of the light elements essential to sustain life. To have abundant supplies of both so close together was a strong investment incentive.

Lady Mac 's radar showed Marcus a serpentine line of one-tonne ice cubes flung out from Lazaro's equatorial mass driver to glide inertly up to the Lagrange point for collection. The same inexhaustible source which allowed Sonora to have its unique sea.

All the asteroids in the cluster had benefited from the plentiful ice, their economic growth racing ahead of equivalent settlements. Such success always bred resentment among the indigenous population, who inevitably became eager for freedom from the founding companies. In this case, having so many settlements so close together gave their population a strong sense of identity and shared anger. The cluster's demands for autonomy had become increasingly strident over the last few years. A situation agitated by numerous violent incidents and acts of sabotage against the company administration staff.

Ahead of the Lady Mac , Marcus could see the tidal hurricane Lazaro stirred up amid the wan amber and emerald stormbands of Zacateca's upper atmosphere. An ocean-sized hypervelocity maelstrom which followed the moon's orbit faithfully around the equator. Lightning crackled round its fringes, five hundred kilometre long forks stabbing out into the surrounding cyclones of ammonia cirrus and methane sleet.

The starship was accelerating at two gees now, her triple fusion drives sending out a vast streamer of arc-bright plasma as she curved around the bulk of the huge planet. Her course vector was slowly bending to align on the star which Antonio intended to prospect, thirty-eight light-years distant. There was very little information contained in the almanac file other than confirming it was a K-class star with a disc.

Marcus cut the fusion drives when the Lady Mac was seven thousand kilometres past perigee and climbing steadily. The thermo-dump panels and sensor clusters sank down into their jump recesses below the fuselage, returning the ship to a perfect sphere. Fusion generators began charging the energy-patterning nodes. Orange circles flashing through Marcus's mind were illustrating the slingshot parabola she'd flown, straightening up the further the planet was left behind. A faint star slid into the last circle.