In astronomy, an asterism is a pattern of stars seen in Earth's sky which is not an official constellation. Like constellations, they are composed of stars which, while they are in the same general direction, are not physically related, often being at significantly different distances from Earth.... , a pattern of stars
In gemmology, an asterism is an optical phenomenon displayed by some ruby, sapphires, and other gemstone of an enhanced reflective area in the shape of a "star" on the surface of a cabochon cut from the stone.... , an optical phenomenon in gemstones
In typography, an asterism is a rarely used symbol consisting of three asterisks placed in a triangle . It is used to call attention to a passage or to separate subchapters in a book.... , a moderately rare typographical symbol denoting a break in passages
