Five-pointed star

Five-pointed star (concave decagon, pentagram). "A five-pointed star (☆) is a common ideogram used throughout the world. If the colinear edges are joined together a pentagram is produced. The five-pointed star used in flags originates from European or Western heraldry, and the golden five-pointed star has associations with military power and war. It has also become a symbol of fame or "stardom" in Western culture." [Five-pointed star. Wikipedia]