General Relativity (Plus Dark Matter and Dark Energy) or Alternative Theories of Gravity

Mathematics – Logic

Scientific paper

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General Relativity And Gravitation, Cosmology, Observational Cosmology, Cosmological Tests, Supernovae, Cosmic Microwave Background Radiation

Scientific paper

One could call 2006 as the year of cosmology since in the year two US scientists were awarded by the Nobel prize for their studies of Cosmic Microwave Back-ground (CMB) spectrum and anisotropy. Studies of CMB anisotropy done with the Soviet spacecraft Prognoz-9 by the Relikt-1 team are reminded. Problems of modern cosmology are outlined. We discuss conformal cosmology parameters from supernovae data in brief. Two approaches to solve the basic problems of cosmology, such as dark matter and dark energy, are discussed, the first (standard) possibility is to introduce new particles, fields etc, the second possibility is to try to change a gravity law to fit observational data. We discuss advantages and disadvantages of the second choice.

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