Results 301 to 310 of about 90,199 (336)
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Physics Reports, 1985
Abstract Following Kristian and Sach's direct observational approach to cosmology, this paper analyses in detail the information that can be obtained from idealised astronomical observations, firstly in the cosmographic case when no gravitational field equations are assumed, and secondly in the cosmological case when Einstein's field equations of ...
George F. R. Ellis +4 more
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Abstract Following Kristian and Sach's direct observational approach to cosmology, this paper analyses in detail the information that can be obtained from idealised astronomical observations, firstly in the cosmographic case when no gravitational field equations are assumed, and secondly in the cosmological case when Einstein's field equations of ...
George F. R. Ellis +4 more
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Observational tests in cosmology
Nature, 1976IT is often said that the determination of the deceleration term is one of the main aims of observational cosmology. In the following comments this view is questioned, and in a universe of indeterminate density, the third time derivative of the scaling variable is shown to be of greater fundamental importance.
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Cosmology with the Laser Interferometer Space Antenna
Living Reviews in Relativity, 2023Germano Nardini
exaly
‘Observational’ Quantum Cosmology
2010Following on the appraisal presented in Chap. 2 of Vol. I, the reader may rightfully be asking: Given the framework of quantum cosmology (QC), where are the boundaries of our knowledge, i.e., what exactly constitutes these limits? What are the best directions to move in, and in particular, what predictions or (falsifiable) tests for the universe can be
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Observational cosmology and cosmological models
Soviet Physics Uspekhi, 1987Igor D. Novikov +2 more
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Modern Cosmological Observations
2002I present a brief discussion of recent extragalactic astrophysics observations relevant to Observational Cosmology. I review some recent results on surveys of galaxies, clusters and Active Galactic Nuclei in the optical, X-ray IR and submm part of the spectrum. The cosmological significance of these observations is discussed.
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Introduction to Observational Cosmology
2015An array of recent astrophysical observations show us two unresolved mysteries of cosmology; the accelerating expansion of the universe and the existence of dark matter. In order to realize the cosmic acceleration in General relativity, an exotic form of energy, now called dark energy, should be dominated in the present universe.
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Cosmology and fundamental physics with the Euclid satellite
Living Reviews in Relativity, 2018Luca Amendola +2 more
exaly