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Probing the Nature of Gravity - Confronting Theory and Experiment in Space (Paperback, 2010 ed.)
Loot Price: R2,873
Discovery Miles 28 730
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Probing the Nature of Gravity - Confronting Theory and Experiment in Space (Paperback, 2010 ed.)
Series: Space Sciences Series of ISSI, 34
Expected to ship within 10 - 15 working days
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Observing our Universe and its evolution with ever increasing
sensitivity from ground-based or space-borne telescopes is posing
great challenges to Fundamental Physics and Astronomy. The remnant
cosmic microwave background, as beautifully measured by successive
space missions COBE, WMAP, and now PLANCK, provides a unique probe
of the very early stages of our Universe. The red-shift of atomic
lines in distant galaxies, the dynamics of pulsars, the large scale
structure of galaxies, and black holes are a few manifestations of
the theory of General Relativity. Yet, today, we understand only 4%
of the mass of our Universe, the rest being called dark energy and
dark matter, both of unknown origin! A second family of space
missions is currently emerging; rather than designing ever more re
nedobservationalinstruments,physicistsandengineersseekalsotousethespaceenvironment
to perform high-precision tests of the fundamental laws of physics.
The technology required for such tests has become available only
over the course of the last decades. Clocks of high accuracy are an
example. They are based on advances in atomic and laser physics,
such as cold atoms, enabling a new generation of highly sensitive
quantum sensors for ground and space experiments. Two experiments
in space have now tested Einstein's relativity theory: * Several
decades ago, Gravity Probe A con rmed the accuracy of the
gravitational red-shift ?5 according to general relativity to a
level of 7x 10 [R. F. C. Vessot et al. , Test of Relativistic
Gravitation with a Space-Borne Hydrogen Maser, Phys. Rev. Lett. 45,
2081-2084 (1980)].
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