Flame-Jewel of the Ancients

The tiny golden sphere, blazing with terrible energy, spelled Galactic Empire at last to the out-space horde, once they had tapped its limitless power. They were grimly amused therefore when Captain Glayne of the Stellar Guardians dropped innocently out of sub-space to view their mighty prize.
The two Terran super Galactics glided side-by-side in the immensity of the interstellar void. Secure in the knowledge that they were the mightiest battleships ever built in the known galaxy, they didn't bother to raise their anti-energy shields. They knew, absolutely, that no other warcraft in the universe could equal their strength....
Jukes, the third pilot, lounged carelessly in his gimbal-slung shock seat, idly watching the screen before him. Aside from his sister ship, there was nothing to be seen but the harsh points of starlight. Cautiously he looked over his shoulder to see if the executive officer were nearby, then, apparently satisfied, lit a cigarette and blew an expansive plume of smoke at the serried banks of instruments that were terraced about him.
Suddenly the intermittent glowing of a red blinker aroused him. Throwing the butt to the deck, he bent forward, squinting into the screen. Far down in one corner he detected an irregularly sparkling mote moving slowly across the blazing points of the distant stars. With a single motion of his arm he swept the Call to Quarters alarm studs and began to speak rapidly into his throat transmitter. As the muffled vibrating thunder of his ship's drivers rose, he could make out his sister ship gradually swinging into an approach orbit.
A double tap on his shoulder informed him that the first pilot was there to take over. Smoothly he slipped from the shock seat and took up his station with the other two pilots near the auxiliary control boards. Everywhere about him was excited, orderly confusion as the huge warship stripped for possible action. The orbit calculators at his left took up the excited jabbering chorus and somewhere above the third pilot was aware of the massive charge accumulators for the Kellander miatron blasters whining up the scale.