A short history of Dark Matter

clipped from christophergovanstreet.blogspot.com A history of the discovery of Dark Matter & Dark Energy universe is made of only 4 percent of the kind of matter we have always assumed it to be — the material that makes up you and me The rest — 96 percent of the universe — is ... who knows? In 1963 discovered a microwave signal that came from every direction of the heavens might be the echo from the beginning of the universe, as predicted by the big-bang hypothesis in the 1970s our own Milky Way were spinning at such a rate that they should have long ago wobbled out of control, shredding apart, shedding stars in every direction a halo of a hypothetical something else might be cocooning each galaxy, dwarfing each flat spiral disk of stars and gas at just the right mass ratio to keep it gravitationally intact astronomers called this mystery mass "dark matter The motions of galaxies don't make sense unless we infer the existence of dark matter