Fundamental Physics and Chemistry Space Science in the Twenty-First Century -- Imperatives for the Decades 1995 to 2015 (1988) / Chapter Skim
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1. Introduction
1. Introduction
Pages 3-7
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From page 3... ...
It cannot be expressed in a relativistically covariant way and is not a field theory in the modern sense. The epoch between the formulation of special relativity in 1905 and the formulation of general relativity in 1916 witnessed the development of many theories of gravitation consistent with special relativity: scalar, vector, and tensor theories in four dimensions.
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Extensive work has been done on formal solutions to the Einstein field equations and the meaning of the singularities in the theory. The properties of black hole solutions have been investigated In sufficient depth to make firm predictions concerning the gravitational radiation emitted by them in encounters with other black holes or stars.
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From page 5... ...
expansion serves as a useful framework with which to test relativistic gravitation. The profound consequences of general relativity are the phenomena that involve strong spac~time curvature and the largescaTe global properties of space-time.
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From page 6... ...
The perihelion advance of Mercury as wed as the bending of starlight by the Sun and the gravitational red shift of spectral lines emanating from the Sun relative to the same lines observed on Earth are the three classical tests suggested by Einstein. It is interesting to note that although the bending of light was observed in the welI-publicized Eddington eclipse expedition of 1918, a reliable measurement of this effect had to wait for the radio interferometer observations of quasi-stelIar sources passing near the Sun in the past decade.
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From page 7... ...
Laser ranging to the corner reflectors placed on the Moon by the Apollo program has allowed a test of the principle of equivalence for gravitational self-energy. The Viking program through the Mars Orbiter and Lander has provided range information without the perturbations due to planetary topography.
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