It predicts the existence of antimatter particles, with the same mass and spin, but with the opposite charge.

Each particle of matter has a corresponding antimatter particle with the opposite electrical charge.

When a matter and corresponding antimatter particle meet, they annihilate each other.

"Are you suggesting that the barrier of antimatter particles around Nestria was created by an enemy?"

It will have to depend on the density of the antimatter particles.

And that's what repels the antimatter particles to clear a safe path for the spaceship.

A deadly barrier of antimatter particles, as you probably have guessed.

Tom questioned the prisoner closely about the barrier of antimatter particles around Nestria.

When he found it, Tom switched the device to full power long enough for the deadly antimatter particles to be permanently dissipated into outer space.

The antimatter particles discovered so far have the same mass and other measurable qualities as comparable particles of matter.