The \\vspace* command adds vertical space like the \\vspace command. LaTeX removes vertical space that comes at the end of a page. If you do not want LaTeX to remove this space, include the optional * argument. Then the space is never removed.
L' ordre\\ vspace * afegeix espai vertical com l' ordre\\ vspace. LaTeX elimina l' espai vertical al final de les pàgines. Si no voleu que LaTeX elimini aquest espai, incloeu l' argument * opcional. Aleshores l' espai no s' esborra mai.