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THIS series of lectures concerns the observational approach to cosmology, to the study of the physical universe. From our home on the earth we look out into the dim distance, back into the dim past, and we strive to imagine the sort of world into which we are born.
- Edwin Powell Hubble
- 1937
observational cosmology. In the view of many cosmologists, we are just entering an age of precision cosmology, in which the values of the key cosmological parameters will be determined accurately and precisely.As is explained later, it is our ability to measure and understand the CMB that is leading the way into this new era. However,
– Cosmology • Einstein’s theory of Gravity • Uncertainty Principle and Virtual Particles • Gravitational and Cosmological Red Shifts – Observational Aspects • The wave nature of light and limitations that this imposes on optical instruments.
Observational Cosmology. R.H. Sanders. Kapteyn Astronomical Institute, Groningen, The Netherlands. Abstract. I discuss the classical cosmological tests– angular size-redshift, flux-redshift, and galaxy number counts– in the light of the cosmology prescribed by the interpretation of the CMB anisotropies.
Reflecting decades of Open University experience in undergraduate teaching, this textbook brings students to the forefront of the rapidly developing field of observational cosmology. Accompanying resources to this textbook are available at: http://www.cambridge.org/features/astrophysics.
40 2. Observational Cosmology Table 2.1. Characteristics of some representative main sequence stars [1]. Stars are classified according to their spectral type (0, B, A, F, G, K, M) ranging from hot to cold. Each class is subdivided into subclasses (0-9). The table shows four examples ranging from 05 (heavy, bright, hot) to M5 (light, dim, cold).
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The Observational Approach to Cosmology. H. H. P. Published in Nature 1 December 1936. Physics. SINCE its first announcement by Dr. E. P. Hubble in 1929, the existence of a linear relation between Velocity’ and distance among the extra-galactic nebulae has excited a great deal of theoretical interest, the more so since it appeared to be a ...
