No, does not seem to be described.....Just the 1st para....long article....no mention conservation of mass/energy..
Physical cosmology
From Wikipedia, the free encyclopedia
This article is about the branch of physics and astronomy. For other uses, see
Cosmology.
"Cosmic Evolution" redirects here. For the book by Eric Chaisson, see
Cosmic Evolution (book).
Part of a series on
Physical cosmology is the study of the largest-scale structures and dynamics of the
Universe and is concerned with fundamental questions about its origin, structure, evolution, and ultimate fate.
[1] For most of human history, it was a branch of
metaphysics and
religion.
Cosmology as a
science originated with the
Copernican principle, which implies that celestial bodies obey identical
physical laws to those on Earth, and
Newtonian mechanics, which first allowed us to understand those physical laws.
Physical cosmology, as it is now understood, began with the development in 1915 of
Albert Einstein's
general theory of relativity, followed by major observational discoveries in the 1920s: first,
Edwin Hubble discovered that the universe contains a huge number of external
galaxies beyond our own
Milky Way; then, work by
Vesto Slipher and others showed that the universe is
expanding. These advances made it possible to speculate about the
origin of the universe, and allowed the establishment of the
Big Bang Theory, by
Georges Lemaitre, as the leading cosmological model. A few researchers still advocate a handful of
alternative cosmologies;
[2] however, most cosmologists agree that the Big Bang theory explains the observations better.
Dramatic advances in observational cosmology since the 1990s, including the
cosmic microwave background, distant
supernovae and galaxy
redshift surveys, have led to the development of a
standard model of cosmology. This model requires the universe to contain large amounts of
dark matter and
dark energy whose nature is currently not well understood, but the model gives detailed predictions that are in excellent agreement with many diverse observations.
[3]
Cosmology draws heavily on the work of many disparate areas of research in theoretical and applied
physics. Areas relevant to cosmology include
particle physics experiments and
theory, theoretical and observational
astrophysics,
general relativity,
quantum mechanics, and
plasma physics.
As I said, it is a long article....maybe you could be a little more specific where in the article you found this: