The Mightiest Machine — John W. Campbell

A million light-years from Earth, one solitary spaceship floats through a vast swarm of enemies. The ship was an experimental vessel from Earth that utilised a revolutionary new concept in space mechanics, developed by the near-superman Aarn Munro. The enemy vessels were wholly unknown to Mankind, for the new drive had taken the Terran vessel into an unmapped void, where not even the telescopes of Earth had ever penetrated before...