zodiacal dust Dust particles, 1 to 300 microns in diameter, that have come from the tails of comets and from collisions between asteroids, and that occupy a flat cloud in the Solar System known as the zodiacal cloud. Related entry zodiacal light Related category INTERSTELLAR AND INTERPLANETARY MATTER Also on this site: Encyclopedia of Alternative Energy & Sustainable Living Encyclopedia of History Transport Concepts & Designs (partner site) |