<P> A five - pointed star (☆), geometrically a regular concave decagon, is a common ideogram in modern culture . Comparatively rare in classical heraldry, it was notably introduced for the flag of the United States in the Flag Act of 1777 and since has become widely used in flags . </P> <P> It has also become a symbol of fame or "stardom" in Western culture, among other uses . </P>

Who came up with the shape of a star