Cosmology HOME
Jump to Tools Naked Eyes The First Telescopes Early Reflectors Golden Era of Refractors Spectroscopy and the Birth of Astrophysics Rebirth of the Reflector New Tools
The Greek Worldview The Start of Scientific Cosmology The Mechanical Universe Island Universes The Expanding Universe Big Bang or Steady State? The Journey Continues
Site Map
 

Model of an Expanding Universe

spacer

 
Drawings of an early and a later stage for two different models of an expanding universe. The left model obeys the cosmological principle, according to which the universe is homogenous and appears the same to an observer anywhere in the universe. The right model obeys the perfect cosmological principle, which adds to the cosmological principle the additional requirement that the universe be unchanged over time—new galaxies emerge continually within the expanding space.

Copyright uncertain, see this note.
spacer
Copyright ©.
Brought to you by the
Center for History of Physics, a Division of the
American Institute of Physics  


Back: Big Bang or Steady State?

Exhibit Home