
 The Age Of The Universe 
  The hot dense phase is generally regarded as the beginning of the universe, and the time since the beginning is, by definition, the age of the universe. 
  When applied to the universe, assuming the Cosmological Principle (the universe is uniform and isotropic on very large scales), the theory provides a relationship between the mass density and the age of the universe. 
  However, it could be that the ages of the oldest stars are too high, or that the assumptions of the inflationary model are wrong, or the measurement of Hubble's constant is in error. 
 www.physics.fsu.edu /Courses/Spring98/AST3033/Universe/age.htm (1675 words) 
