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Gravity

Fractal Fractal posted on Jan 29, 2013
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Description


Gravitation, or gravity, is the natural phenomenon by which physical bodies appear to attract each other with a force proportional to their masses. It is most commonly experienced as the agent that gives weight to objects with mass and causes them to fall to the ground when dropped. The phenomenon of gravitation itself, however, is a byproduct of a more fundamental phenomenon described by general relativity, which suggests that spacetime is curved according to the presence of matter through a yet-to-be discovered mechanism. Gravitation is one of the four fundamental interactions of nature, along with electromagnetism, and the nuclear strong force and weak force. In modern physics, the phenomenon of gravitation is most accurately described by the general theory of relativity by Einstein, in which the phenomenon itself is a consequence of the curvature of spacetime governing the motion of inertial objects. The simpler Newton's law of universal gravitation provides an accurate approximation for most physical situations including calculations as critical as spacecraft trajectory. From a cosmological perspective, gravitation causes dispersed matter to coalesce, and coalesced matter to remain intact, thus accounting for the existence of planets, stars, galaxies and most of the macroscopic objects in the universe. It is responsible for keeping the Earth and the other planets in their orbits around the Sun; for keeping the Moon in its orbit around the Earth; for the formation of tides; for natural convection, by which fluid flow occurs under the influence of a density gradient and gravity; for heating the interiors of forming stars and planets to very high temperatures; and for various other phenomena observed on Earth and throughout the universe. Thanks Magik _______________ La gravitation est le phénomène d'interaction physique qui cause l'attraction réciproque des corps massifs entre eux, sous l'effet de leur masse. Il s'observe au quotidien en raison de l'attraction terrestre qui nous retient au sol, qui se nomme la gravité et qui est responsable de plusieurs manifestations naturelles : les marées, l'orbite des planètes autour du Soleil, la sphéricité de la plupart des corps célestes en sont quelques exemples. D'une manière plus générale, la structure à grande échelle de l'univers est déterminée par la gravitation. Plusieurs théories ont tenté de rendre compte de la gravitation. Aujourd'hui, la théorie de la relativité générale d'Albert Einstein, proposée en 1915, est celle qui décrit toutes les observations faites en astronomie ainsi qu'en cosmologie. La loi de la gravitation de Newton, élaborée à la fin du xviie siècle, demeure cependant une excellente approximation dans la plupart des cas (vitesses faibles par rapport à celle de la lumière), et on l'utilise donc encore aujourd'hui pour sa simplicité. Aux échelles microscopiques, la gravitation est la plus faible des quatre interactions fondamentales de la physique ; elle devient dominante au fur et à mesure que les échelles de grandeur augmentent. Avec la force électromagnétique, elle est la seule à agir au-delà de la dimension du noyau atomique. De plus, comme elle est toujours attractive elle domine sur les forces électromagnétiques qui tendent à se compenser, étant tantôt attractives, tantôt répulsives. Elle est toujours l'objet de nombreuses recherches et la communauté scientifique considère qu'élaborer une théorie plus complète de la gravitation, capable de prendre en compte les effets de nature microscopique (quantiques), et pour cette raison appelée gravitation quantique, est un des grands défis à relever pour la physique du xxie siècle. Merci Magik

Comments (42)


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flavia49

12:16PM | Wed, 30 January 2013

wonderful work

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Darkwish

4:00PM | Wed, 30 January 2013

Great work, very well done!

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rocdan

4:30PM | Wed, 30 January 2013

stunning fantastic fractal very well done

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jeroni

5:18PM | Wed, 30 January 2013

beautiful, love the colors and lighting excellent work

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sandra46

5:47PM | Wed, 30 January 2013

GREAT WORK

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Flint_Hawk

8:36PM | Wed, 30 January 2013

Fantastic design!

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RodS

9:24PM | Wed, 30 January 2013

I can definitely sense the gravity of the situation...... sorry, couldn't resist! LOL! A really beautiful render, and excellent information, Real!

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LBJ2

5:52AM | Thu, 31 January 2013

Einstein would have called it relatively beautiful. Good work.

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ia-du-lin

2:21PM | Thu, 31 January 2013

beautiful pattern and colors, nice fractal image.

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adrie

2:28PM | Thu, 31 January 2013

Wonderful fractal artwork Magik.

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Star4mation

2:18PM | Sat, 02 February 2013

Cool fractal Magik :)

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bluart

7:11PM | Mon, 04 February 2013

interessant,excellent travail

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