The boldest of the officers resumed speaking. 'That one ship is ninety million miles long, Your Highness. It shimmers like fire, but moves so fast that we cannot approach it. But it came into the center of our fleet almost touching our ships, stayed there twenty or thirty thousandths of a second. There it was, we thought. We saw the evidence of life on board: light beams waved; they examined us and then, of course, it lapsed back into nonspace. Ninety million miles, Your Highness. Old Earth has some stings yet and we do not know what the ship is doing.'

[...]

The cabin was small, twenty feet by thirty. The control area of the ship measured nothing over a hundred feet. All the rest was a golden bubble of the feinting ship, nothing more than thin and incredibly rigid foam with tiny wires cast across it so as to give the illusion of a hard metal and strong defenses. The ninety million miles of length were right. Nothing else was. The ship was a gigantic dummy, the largest scarecrow ever conceived by the human mind.

(Corwainer Smith, "Golden The Ship Was—Oh! Oh! Oh!")