Antimatter

Antimatter was the opposite of normal matter. Particles of antimatter contain the opposite charge of normal matter. Matter and antimatter annhiliate each other when they come into contact, releasing huge amounts of energy.

Antimatter traces were left by passing starships.

The Black Star Confederacy and the Kartanin Dominion both utilize fully functional antimatter reactors. Rumour has it that Muir Corporation is also exploring the technology.