certificate, diploma of completion with abstract gold background, sparkling twinkling stars. cosmic shiny galaxy (atmosphere)

abstract achievement adult award backdrop background banner big border bright card celebration certificate christmas completion congratulation cosmic cosmos course degree design diploma education educational elegant element festival festive finishing frame galaxy glitter glow gold graduate graduation greeting happy holiday horizontal layout lessons milky new night pattern premium qualification reward shine shiny sky space sparkle starlight stars stellar symbol template texture training twinkle vector voucher way winner xmas year