Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989nascp3046..163c&link_type=abstract
In NASA, Relativistic Gravitational Experiments in Space p 163-165 (SEE N90-19940 12-90)
Astronomy and Astrophysics
Astrophysics
Gravitational Waves, Relativity, Astrophysics, Mercury (Planet), Newton Theory, Perihelions, Precession
Scientific paper
The discussion of new tests of relativity must begin with a definition of the word new. Included, under that rubric, not only tests that have never been attempted before or never produced a useful result, but also those that may be repeated with significantly improved results. Thus, the classical tests insofar as they have been recently refined are discussed and the results are given obtained at the Center for Astrophysics (CFA). A new test of relativity is described via the detection of the de Sitter precession of the Moon's orbit. These tests, when considered in the parameterized post-Newtonian (PPN) framework, have all involved determining combinations of beta and gamma. A further topic of consideration is that of old data. In attempting to improve a test of relativity, particularly when the effect to be discerned is a secular one, such as the relativistic perihelion advance of Mercury, it is important to maintain the original set of data, so that the experiment need not start all over.
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