Relativity and Space & Time

This page contains more information about the special and the general theory of relativity. The first of two theories describing the relationship of matter, time, and space, showing that mass and energy are equivalent, and that mass, length, and time change with velocity. The theory is based on two assumptions: that the speed of light in a vacuum is constant, and that physical laws have the same mathematical form throughout the universe.

Lectures on Relativity and Astrophysics

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Differential Geometry - General Relativity

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Albert Einstein - Relativity

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History of Time

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The Origin and Evolution of the Solar System

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Black Holes Wormholes and Time Machines

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Stephen Hawking - Space & Time Warps

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An Introduction to the Science of Cosmology

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Seeking Ultimates An Intuitive Guide to Physics

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