Fundamental concepts : Newtonian cosmology Flashcards
1
Q
Cosmological principle
A
The Universe is homogeneous in content and in laws.
in practice in means that the General Relativity is valid on the largest scale of the Universe.
2
Q
What is the Newtonian model of cosmology ?
A
It is a model of the homogeneous expanding Universe
3
Q
When does the Newtonian model of cosmology breaks down ?
A
It breaks down at high densities and large distances (whcih require GR)
4
Q
In what context is the Newtonian model of cosmolgy accurate
A
It is accurate for matter dominated models expanding over flat-space time.
