Now, todays picture is not the colorful Kind, some seem to love, its about "Dark Matter". As many Man, the Universe has a dark Side, too, it is called the Dark Matter, because it cannot be seen, but detected by its massive Gravity. Up to 95 Percent of all Mass is dark, so Dark Matter matters in the endless Void. The most modern theory is, that it is formed by microscopic Black Holes, which were created during the first Seconds of the Big Bang, like Foam or Bubbles. Scientists of the MIT just now try to proof that by measuring the Distance to Mars: If such a Mignon with the Mass of about ten Suns passes through our Solar-System, it will bend the Space around it and the Distance will change. Practically its difficult to show, what cannot be seen! I tried Backlighting and Reflected Light, but Results varied. May the Community judge justly! ;)