Deflector

Once the asteroids are spotted and their orbits determined, an earthbound asteroid can be nudged slightly off course with a satellite deflector or a high velocity projectile, or blown up with nuclear weapons, causing it to miss its deadly rendezvous.

1992 Nasa Patents Available for Licensing from the George C. Marshall Space Flight Center The deflector assembly contains a plurality of vanes which change the direction of the solar energy to the vertical, while constantly keeping the same side of the deflector facing the sun.

The blasters are those beams of ravening destruction which take care of recalcitrant meteorites in a spaceship's course when the deflectors can't handle them.

Deflectors say there's something there, sensors say there isn't. Density negative. Radiation negative. Energy negative.

PICARD: If the Romulans have returned to this sector we should know about that. Mister Worf, any further activity? WORF: Negative, sir. PICARD: Slow to half impulse. LAFORGE: Going to one half impulse. ... Now entering quadrant nine-zero-seven, mark three. PICARD: Shields and deflectors up. Go to Yellow Alert.