>>5590715https://science.nasa.gov/astrophysics/focus-areas/what-is-dark-energy85% all the gravity we measure in the universe, comes from a source about we about which we know nothing. We call it dark matter but since work fundamentally Clueless. The dark matter is just a placeholder name we can call it anything"penis face". Dark matter was discovered in 1933 in around for awhile and it was discovered by Fritz Zwicky. What he did he studied a large cluster of galaxies happens to be called the coma cluster, it has a thousand galaxies in it. Galaxy itself billions of star so this is a massive structure in the universe and all these galaxies are bound together by there mutual gravity. What he found is that the speed that these galaxies are moving within the cluster is faster then the collective gravity of each Galaxy can sustain. In other words at the speeds he found the moving the Galaxy should have flown apart from one another long ago., but they're not bound together still bound together. He proposed that there's some missing Mass that must lurk somewhere within the cluster who's extra gravity he was tracking. This result turned out to be true for every single cluster ever measured ever since. Back it was known as the missing Mass problem, today we call it the Dark Matter problem. Fast forward 1976 Carnegie astrophysicist Vera Rubin she was studying the rotation of spiral galaxy. What she found is that they were rotating faster then the know Mass within the Galaxy should allow. Dark Matter it turned out was not a problem unique to Galaxy clusters, it was a problem that reveals itself even Galaxy's themselves. Could it be dark clouds, black holes, dark planets anything dark? No to all that shit. If it has substance then it can not be made of anything familiar. Familiar materials they absorb, reflect, refract and otherwise interact with light and other materials but this stuff doesn't interact with anything at all not even itself.