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3 days ago · “The conclusion I shall arrive at,” he wrote in his 1917 paper, “is that the field equations of gravitation, which I have championed hitherto, still need a slight modification, so that on ...
2 days ago · Vitruvius (fl. 1st century BCE) understood that objects fall based on their specific gravity. In the 6th century CE, Byzantine Alexandrian scholar John Philoponus modified the Aristotelian concept of gravity with the theory of impetus.
1 day ago · The works of Isaac Newton and Albert Einstein dominate the development of gravitational theory. Newton’s classical theory of gravitational force held sway from his Principia , published in 1687, until Einstein’s work in the early 20th century.
5 days ago · The squares of the sidereal periods (of revolution) of the planets are directly proportional to the cubes of their mean distances from the Sun. Knowledge of these laws, especially the second (the law of areas), proved crucial to Sir Isaac Newton in 1684–85, when he formulated his famous law of gravitation between Earth and the Moon and ...
- The Editors of Encyclopaedia Britannica
5 days ago · In 1915, Albert Einstein proposed general relativity, a fundamental theory in physics. It defines gravity as a geometric property of spacetime in which massive objects such as stars and planets warp the fabric of space and time, causing other objects to move in curved paths.
1 day ago · These theories are called alternative gravitational theories. Theories such as f(Q), f(R), f(T), f(G) and f(R, T) can be given as examples. f(R, T) theory was proposed by Harko et al. in 2011 to explain the acceleration of the universe, and has since been studied in detail by many scientists (Harko et al. 2011).
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1 day ago · Gravitational waves are waves of the intensity of gravity that are generated by the accelerated masses of binary stars and other motions of gravitating masses, and propagate as waves outward from their source at the speed of light. They were first proposed by Oliver Heaviside in 1893 and then later by Henri Poincaré in 1905 as the ...
