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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.

Cosmology@	Dark_Matter@
Observational_Cosmology@	Quantum_Gravity@
Particle	Quantum Field Theory
Relativistic	Alternative
Articles	Black Holes
Branes	Courses and Tutorials
Journals and Preprints	Overviews
People	Research Groups
Simulators	Special Relativity
Time Travel	Topological Defects
NewsGroup (Usenet)

• An Essay on General Relativity This site contains a comprehensive introduction to the basic ideas and tests of general relativity
• Are There Pictorial Examples of Covariant and Contravariant Vectors We present pictorial means of distinguishing contravariant vectors (or simply vectors) from covariant vectors (or linear forms).
• Derivation of gravitational waves in Einstein, Brans-Dicke and Rosen theories of gravity. Mathematical derivation of gravitational waves to quadrupole order in the Brans-Dicke scalar-tensor and Rosen bi-metric theories of gravity.
• Experimental Gravitational Physics Using Drag-Free Satellites Covers current and past projects in experimental gravitational physics using Drag-Free Satellites including the Relativity Gyro, Equivalence Principle, and LISA.
• General Relativity Simulation Contest The purpose of this Contest is to prove General Relativity using a (simple) algorithm.
• Gravitational Lensing A popular site with interactive demonstrations of gravitational lensing. The background material is at a graduate level
• Gravitational Waves: An Introduction This paper presents an elementary introduction to the theory of gravitational waves. This article is meant for students who have had an exposure to general relativity, but results from general relativity have been derived in the appendices.
• Gravity of Gravity An experiment at the University of Washington seeks to determine whether the gravitational binding energy of an object generates gravity of its own.
• Gravity Probe B Gravity Probe B is the relativity gyroscope experiment being developed by NASA and Stanford University to test two extraordinary, unverified predictions of Albert Einstein's general theory of relativity.
• Handbook of Space Astronomy and Astrophysics - Relativity A collection of equations important to both special relativity and general relativity.
• Hyperspace at the University of British Columbia Includes links to online journals, news and preprint archives, as well as lists of faculty at this university.
• Interactive Experiments in Gravity Try an experiment that illustrates the gravitational attraction between two objects or use a Java applet to understand how orbits work in strongly curved space-time.
• Lecture Notes on General Relativity Sean M. Carroll's lecture notes from a one-semester graduate-level course he taught at MIT in 1996. Notes are in postscript format.
• Lecture Notes on General Relativity (Sean Carroll) Lecture notes for a one-semester course in General Relativity.
• Mark Roberts Homepage Useful information and links on relativity, quantum theory, and cognition.
• NOVA Online/Einstein Revealed Profile of Albert Einstein, with additional teaching resources, Shockwave demonstrations, and animations of relativity concepts.
• NOVA Online/Einstein Revealed NOVA presents a profile of Albert Einstein, with additional teaching resources, Shockwave demonstrations, and animations of relativity concepts.
• Physics Bookshelf - Relativity A collection of articles about relativity
• Publications in Physics and Mathematics by Walter Pfeifer A textbook for relativistic quantum mechanics is presented. The Dirac equation is dealt with in detail.
• QMW Hyperspace A set of hypertext based services for general relativity research provided by the QMW Relativity group.
• Queen Mary - QMW Hyperspace GR A set of hypertext based services for general relativity research provided by the QMW Relativity group
• Relativity Provides information on the history, experiments and paradoxes of relativity.
• Relativity bookmarks Rob Salgado's bookmarks
• Relativity Forum Forum devoted to discussing the Einstein's special and general theories of relativity.
• Ricci A Mathematica package for doing tensor calculations in differential geometry and general relativity.
• Ricci A Mathematica package for doing tensor calculations in differential geometry.
• Shapiro Radar Bounce Test A two part overview of the Shapiro radar bounce test of general relativity. (The two parts consist of a section for normal people, and one for nerds)
• Solving Einstein's Equations in Three Dimensions This is a Mathematica notebook showing how to plot light cones in two plus one spacetime dimensions with a point mass.
• Southampton GR Explorer An introduction to Einstein's theory of General Relativity and related topics. These pages include informative text, pictures and movies.
• Stanford U. - Gravity Probe B Gravity Probe B is the relativity gyroscope experiment being developed by NASA and Stanford University to test two extraordinary, unverified predictions of Albert Einstein's general theory of relativity.
• The 5D Spacetime Consortium We are a group of physicists and astronomers working on a 5-dimensional version of general relativity.
• The Cosmological Constant An overview of why Einstein added an extra term in general relativity, and why it is still examined.
• The Special Theory of Relativity Self-tutorial with short essays, questions and answers.
• Why Time is Absolute, and Relative, But Never Universal An article by Vincent Sauvé elaborating upon a materialist view of the absolute and relative nature of time.

 

 

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