11-05-2012, 12:01 PM
cosmology
cosmology..ppt (Size: 7.17 MB / Downloads: 175)
What is Dark Matter ?
Must be weakly interacting to avoid detection so far.
A promising idea in particle physics is Supersymmetry:
The lightest supersymmetric particle (the neutralino = gravitino+photino+zino) could be detected in 2007 at Europe’s CERN Large Hadron Collider (LHC).
Special relativity
The laws of physics are precisely the
same in all inertial frames of reference.
General relativity
The laws of physics are precisely the
same in all inertial and freely falling
frames of reference.
Four major accomplishments in extragalactic astronomy
The establishment of the Hubble classification scheme of galaxies
The convincing proof that galaxies are island “universes”
The distribution of galaxies in space
The discovery that the universe is expanding