dark matter

• dark matter makes up about 26% of the universe. the first hint of its existence came in 1933, when astronomical observations and calculations of gravitational effects revealed that there must be more 'stuff' present in the universe than telescopes could see.
  researchers now believe that the gravitational effect of dark matter makes galaxies spin faster than expected, and that its gravitational field deviates the light of objects behind it. measurements of these effects show that dark matter exists, and they can be used to estimate the density of dark matter even though we cannot directly observe it.
  but what is dark matter? one idea is that it could contain ‘supersymmetric particles’ - hypothesized particles that are partners to those already known in the standard model. experiments at the large hadron collider may be able to find them.
  
  dahası için: http://public.web.cern.ch/…/en/science/dark-en.html