Hartnett turned to look into the visiplates. The derelict ship had landed nicely on the spaceport near the metallurgical station. He nodded with satisfaction. At least the blast of her tubes hadn't detonated the pile. He looked into a sky plate and saw that she had not landed a minute too soon. Two Martian cruisers, their black shapes dark against the starry sky, were hanging low over her. Others circled behind them, and higher than all the others, Hartnett could make out the huge shape of the superdreadnaught that Blake had seen. That was the one he wanted! For perhaps twenty minutes the Martians hung suspiciously over the still landscape of Oberon. Then a cruiser detached itself and began to sink down towards the spaceport on a long, slowly diminishing column of flame. Hartnett swore. They were going to try and land! That wouldn't do at all. He had to goad them into attacking. He snapped an order to Drew. Only one of the _Artemis'_ proton cannon was connected with the remote control apparatus in the _Darkside_ but Hartnett hoped it would be enough. It had to be. Taking the gun control himself, he swung the sight so that it pointed at the lowest cruiser. A flash of energy sizzled from the projector, and spattered on the exposed flank of the Cat cruiser throwing sparks wildly like the glitter of a child's Fourth of July sparkler. The ship shuddered under the impact and glowed white hot along the scarred beam. Like a speeded up motion picture shot, the Cat ship leaped away from the spaceport, leveling its own guns at the recumbent _Artemis_. The men in the _Darkside_ caught a glimpse of the other ships bearing their projectors, and far above, Hartnett was elated to see that the superdreadnaught had extended the muzzles of its massive cyclotronic rifles. The cruisers fired first, and the screens went blank, so the Terrans never saw the rest of it. But up in the darkened Control Chavez and Scott were witnesses to one of the greatest cataclysms men have ever seen. The tiny disk of Oberon seemed to light up with a white fire; swelling like a glowing balloon and then shattering with a violence that left them speechless. The very atmosphere of Uranus under the low swinging moonlet boiled and billowed with a frightful incandescence, great prominences of radioactivated methane spouting high into the air as the very internal balance of the great planet teetered. A shock-wave of corruscating fire shot out from the blazing surface of Oberon, engulfing the Martian warships in a sea of spinning, scintillating destruction. Like a tiny nova, the satellite flared in the black silence of deep space, vaporizing everything within ten thousand miles of it; churning the very vacuum into a hell of hard radiation. Scott stared at the outside Geiger counters as they chattered their story of charged ions and electrons battering, even at this distance, at sheathing in the destroyer's hull.