Topics: Physics : Relativity
Classical mechanics generalized (extended) to realm of high velocities (special relativity), and strong gravitational fields (general relativity). In particular, the theory that time and space form a single 'spacetime' which is curved in the presence of energy and mass.
Alternative
Although the theory of relativity has been accepted by the scientific community for nearly a century, there are other theories proposed.
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Articles
This is the category for articles in the field of relativity that deal not with the theory as a whole, but with selected aspects of relativistic physics.
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Associations
Associations and organizations concerned with research on Einstein's theories of relativity.
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Black Holes
This category is dedicated to sites about black holes - ultra-compact astronomical objects that are predicted by Einstein's theory of general relativity, whose gravity is so strong that not even light can escape.
Education,
Observations,
Simulations,
Thermodynamics,
Wormholes,
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Experiment and Observation
Sites and pages that deal with observational and experimental tests of relativity, such as the measurement of light deflection or gravitational time dilation.
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Gravitational Lensing
Sites and pages with material about the astronomical applications of the gravitational deflection of light predicted by general relativity: from the multiple and distorted images produced when the light of distant astronomical objects is deflected by the masses of less distant galaxies or other astronomical bodies, astronomers and cosmologists can extract information about the lensing system, the distant source, or even the cosmos as a whole.
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Gravitational Waves
Contains material about gravitational waves, which are wave-like disturbances of spacetime that propagate at the speed of light, predicted by general relativity.
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History
The history of relativity covers, roughly speaking, related events from the Michaelson-Morley experiment through the formulation of general relativity.
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People
Hawking, Stephen,
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Research Groups
Groups, institutes, departments and organizations devoted to research on relativity: The special theory of relativity, and Einstein's theory of gravity, general relativity.
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Software
Software that is useful for relativity research, notably software for numerical simulations and for algebraic calculations.
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Time Travel
In this category you can find everything on the possibilities of time travel (illusion or reality?) in the framework of Einstein's theory of relativity.
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