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2. Theory of relativity - Wikipedia

   en.wikipedia.org/wiki/Theory_of_relativity

   Special relativity is a theory of the structure of spacetime. It was introduced in Einstein's 1905 paper "On the Electrodynamics of Moving Bodies" (for the contributions of many other physicists and mathematicians, see History of special relativity). Special relativity is based on two postulates which are contradictory in classical mechanics:

3. General relativity - Wikipedia

   en.wikipedia.org/wiki/General_relativity

   General relativity, also known as the general theory of relativity, and as Einstein's theory of gravity, is the geometric theory of gravitation published by Albert Einstein in 1915 and is the current description of gravitation in modern physics.

4. Special relativity - Wikipedia

   en.wikipedia.org/wiki/Special_relativity

   In physics, the special theory of relativity, or special relativity for short, is a scientific theory of the relationship between space and time.In Albert Einstein's 1905 paper, On the Electrodynamics of Moving Bodies, the theory is presented as being based on just two postulates: [p 1] [1] [2]

5. Albert Einstein - Wikipedia

   en.wikipedia.org/wiki/Albert_Einstein

   Einstein's 1905 work on relativity remained controversial for many years, but was accepted by leading physicists, starting with Max Planck. [ note 5 ] [ 235 ] Einstein originally framed special relativity in terms of kinematics (the study of moving bodies).

6. History of general relativity - Wikipedia

   en.wikipedia.org/wiki/History_of_general_relativity

   General relativity is a theory of gravitation that was developed by Albert Einstein between 1907 and 1915, with contributions by many others after 1915. According to general relativity, the observed gravitational attraction between masses results from the warping of space and time by those masses.

7. The Meaning of Relativity - Wikipedia

   en.wikipedia.org/wiki/The_Meaning_of_Relativity

   The first is titled "Space and Time in Pre-Relativity Physics". The second lecture is titled The Theory of Special Relativity and discusses the special theory of relativity. The third and fourth lectures cover the general theory of relativity in two parts. Einstein added an appendix to update the book for its second edition, which published in ...

8. Rare Einstein manuscript with relativity calculations goes ...

   www.aol.com/news/relatively-rare-einstein...

   A rare manuscript featuring early calculations that led to Albert Einstein's general theory of relativity sold for just over $13 million at an auction in Paris Tuesday, becoming the most expensive ...

9. Relativity of simultaneity - Wikipedia

   en.wikipedia.org/wiki/Relativity_of_simultaneity

   Einstein's version of the experiment [15] presumed that one observer was sitting midway inside a speeding traincar and another was standing on a platform as the train moved past. As measured by the standing observer, the train is struck by two bolts of lightning simultaneously, but at different positions along the axis of train movement (back ...