During the last decades, scientists have been searching for all kind of particles to explain the “dark matter” effect. But these particles are either too heavy, too rare, not transparent, or they combine to form more complex structures that would become visible. But a couple of years ago, I discovered a much simpler solution to this problem, and I am offering it in my new book (still only in German) “Eine Lösung für das Geheimnis der dunklen Materie” (Author: Thilo Müller). If light is