gravity well et event horizon sur la table.
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Re: gravity well et event horizon sur la table.
C'est excellent je trouve.
tu as trouver ça ou comme image ?? a moins que tu ne les postes pour que l'ont te copie tout ça
tu as trouver ça ou comme image ?? a moins que tu ne les postes pour que l'ont te copie tout ça
elric130- Messages : 404
Date d'inscription : 09/09/2011
Age : 46
Localisation : Marseille
Re: gravity well et event horizon sur la table.
alors ou???bonne quéstion ^^ je les poste dés que possible ; )
Re: gravity well et event horizon sur la table.
Bonne idée, mais j'ai juste une petite question briaeros : pour toi, c'est quoi un Gravity Well et un Event Horizon ?
Mr. J- Psychopathe Aliéné
- Messages : 3038
Date d'inscription : 02/05/2011
Age : 39
Localisation : Ava (28)
Re: gravity well et event horizon sur la table.
Mr. J a écrit:c'est quoi un Gravity Well et un Event Horizon ?
alors pour faire simple tu prend la traduction faite et tu regarde a règle optionelles (pages 63 a 65)
peut pas mieux te dire
elric130- Messages : 404
Date d'inscription : 09/09/2011
Age : 46
Localisation : Marseille
Re: gravity well et event horizon sur la table.
elric130 a écrit:Mr. J a écrit:c'est quoi un Gravity Well et un Event Horizon ?
alors pour faire simple tu prend la traduction faite et tu regarde a règle optionelles (pages 63 a 65)
peut pas mieux te dire
Ce n'est pas ça que je veux dires ; je demandes juste à briaeros ce qu'est pour lui ce que je demandes, car moi je sais ce que c'est ; j'avais par exemple vu que l'un des deux avait été traduis par Trou Noir à un moment, alors que ce n'est pas du tout ça.
Mr. J- Psychopathe Aliéné
- Messages : 3038
Date d'inscription : 02/05/2011
Age : 39
Localisation : Ava (28)
Re: gravity well et event horizon sur la table.
Event horizonFrom Wikipedia, the free encyclopedia
Jump to: navigation, search
For other uses, see Event horizon (disambiguation).
This article includes a list of references, but its sources remain unclear because it has insufficient inline citations. Please help to improve this article by introducing more precise citations where appropriate. (March 2009)
General relativity
Introduction
Mathematical formulation
Resources
Fundamental concepts[show]
Special relativity
Equivalence principle
World line · Riemannian geometry
Phenomena[show]
Kepler problem · Lenses · Waves
Frame-dragging · Geodetic effect
Event horizon · Singularity
Black hole
Equations[show]
Linearized Gravity
Post-Newtonian formalism
Einstein field equations
Friedmann equations
ADM formalism
BSSN formalism
Advanced theories[show]
Kaluza–Klein
Quantum gravity
Solutions[show]
Schwarzschild
Reissner-Nordström · Gödel
Kerr · Kerr-Newman
Kasner · Taub-NUT · Milne · Robertson-Walker
pp-wave · van Stockum dust
Scientists[show]
Einstein · Minkowski · Eddington
Lemaître · Schwarzschild
Robertson · Kerr · Friedman
Chandrasekhar · Hawking
· others
v · d · e
In general relativity, an event horizon is a boundary in spacetime beyond which events cannot affect an outside observer. In layman's terms it is defined as "the point of no return" i.e. the point at which the gravitational pull becomes so great as to make escape impossible. The most common case of an event horizon is that surrounding a black hole. Light emitted from beyond the horizon can never reach the observer. Likewise, any object approaching the horizon from the observer's side appears to slow down and never quite pass through the horizon, with its image becoming more and more redshifted as time elapses. The traveling object, however, experiences no strange effects and does, in fact, pass through the horizon in a finite amount of proper time.
More specific types of horizon include the related but distinct absolute and apparent horizons found around a black hole. Still other distinct notions include the Cauchy and Killing horizon; the photon spheres and ergospheres of the Kerr solution; particle and cosmological horizons relevant to cosmology; and isolated and dynamical horizons important in current black hole research.
Contents [hide]
1 Event horizon of a black hole
2 Particle horizon of the observable universe
3 Apparent horizon of an accelerated particle
4 Interacting with an event horizon
5 Beyond general relativity
6 See also
7 References
7.1 More technical references
8 Notes
[edit] Event horizon of a black holeMain article: Black hole
Far away from the black hole a particle can move in any direction. It is only restricted by the speed of light.
Closer to the black hole spacetime starts to deform. In some convenient coordinate systems, there are more paths going towards the black hole than paths moving away.[Note 1]
Inside of the event horizon all paths bring the particle closer to the center of the black hole. It is no longer possible for the particle to escape.
One of the most well-known examples of an event horizon derives from general relativity's description of a black hole, a celestial object so dense that no nearby matter or radiation can escape its gravitational field. Often, this is described as the boundary within which the black hole's escape velocity is greater than the speed of light. However, a more accurate description is that within this horizon, all lightlike paths (paths that light could take) and hence all paths in the forward light cones of particles within the horizon, are warped so as to fall farther into the hole. Once a particle is inside the horizon, moving into the hole is as inevitable as moving forward in time, and can actually be thought of as equivalent to doing so, depending on the spacetime coordinate system used.[2][3][4][5]
The surface at the Schwarzschild radius acts as an event horizon in a non-rotating body that fits inside this radius (although a rotating black hole operates slightly differently). The Schwarzschild radius of an object is proportional to its mass. Theoretically, any amount of matter will become a black hole if compressed into a space that fits within its corresponding Schwarzschild radius. For the mass of the Sun this radius is approximately 3 kilometers and for the Earth it is about 9 millimeters. In practice, however, neither the Earth nor the Sun has the necessary mass and therefore the necessary gravitational force, to overcome electron and neutron degeneracy pressure. The minimal mass required for a star to be able to collapse beyond these pressures is the Tolman-Oppenheimer-Volkoff limit, which is approximately three solar masses.
Black hole event horizons are especially noteworthy for three reasons. First, there are many examples near enough to study. Second, black holes tend to pull in matter from their environment, which provides examples where matter about to pass through an event horizon is expected to be observable. Third, the description of black holes given by general relativity is known to be an approximation and it is expected that quantum gravity effects become significant in the vicinity of the event horizon. This allows observations of matter in the vicinity of a black hole's event horizon to be used to indirectly study general relativity and proposed extensions to it.
Donc, je n'ai jamais parler d'un trou noir (black hole), c'est une anomalie spatiotemporelle que l'on peut notament observer autour d'un trou noir. Genre de truc pas façile a visualiser sur une table de jeux, pour simplifier je place un trou noir (impact visuel et objet spatiale connu de tous) en éxpliquant qu'il est trés loin de la zone des combats mais que sa présence lointaine provoque l'event horizon. En gros, je trouve ça plus joli qu'une bande noire marquée event horizon sur la table mais les gouts et les couleurs ne se discute pas ^^ en gros vivre et laisser vivre.
Jump to: navigation, search
For other uses, see Event horizon (disambiguation).
This article includes a list of references, but its sources remain unclear because it has insufficient inline citations. Please help to improve this article by introducing more precise citations where appropriate. (March 2009)
General relativity
Introduction
Mathematical formulation
Resources
Fundamental concepts[show]
Special relativity
Equivalence principle
World line · Riemannian geometry
Phenomena[show]
Kepler problem · Lenses · Waves
Frame-dragging · Geodetic effect
Event horizon · Singularity
Black hole
Equations[show]
Linearized Gravity
Post-Newtonian formalism
Einstein field equations
Friedmann equations
ADM formalism
BSSN formalism
Advanced theories[show]
Kaluza–Klein
Quantum gravity
Solutions[show]
Schwarzschild
Reissner-Nordström · Gödel
Kerr · Kerr-Newman
Kasner · Taub-NUT · Milne · Robertson-Walker
pp-wave · van Stockum dust
Scientists[show]
Einstein · Minkowski · Eddington
Lemaître · Schwarzschild
Robertson · Kerr · Friedman
Chandrasekhar · Hawking
· others
v · d · e
In general relativity, an event horizon is a boundary in spacetime beyond which events cannot affect an outside observer. In layman's terms it is defined as "the point of no return" i.e. the point at which the gravitational pull becomes so great as to make escape impossible. The most common case of an event horizon is that surrounding a black hole. Light emitted from beyond the horizon can never reach the observer. Likewise, any object approaching the horizon from the observer's side appears to slow down and never quite pass through the horizon, with its image becoming more and more redshifted as time elapses. The traveling object, however, experiences no strange effects and does, in fact, pass through the horizon in a finite amount of proper time.
More specific types of horizon include the related but distinct absolute and apparent horizons found around a black hole. Still other distinct notions include the Cauchy and Killing horizon; the photon spheres and ergospheres of the Kerr solution; particle and cosmological horizons relevant to cosmology; and isolated and dynamical horizons important in current black hole research.
Contents [hide]
1 Event horizon of a black hole
2 Particle horizon of the observable universe
3 Apparent horizon of an accelerated particle
4 Interacting with an event horizon
5 Beyond general relativity
6 See also
7 References
7.1 More technical references
8 Notes
[edit] Event horizon of a black holeMain article: Black hole
Far away from the black hole a particle can move in any direction. It is only restricted by the speed of light.
Closer to the black hole spacetime starts to deform. In some convenient coordinate systems, there are more paths going towards the black hole than paths moving away.[Note 1]
Inside of the event horizon all paths bring the particle closer to the center of the black hole. It is no longer possible for the particle to escape.
One of the most well-known examples of an event horizon derives from general relativity's description of a black hole, a celestial object so dense that no nearby matter or radiation can escape its gravitational field. Often, this is described as the boundary within which the black hole's escape velocity is greater than the speed of light. However, a more accurate description is that within this horizon, all lightlike paths (paths that light could take) and hence all paths in the forward light cones of particles within the horizon, are warped so as to fall farther into the hole. Once a particle is inside the horizon, moving into the hole is as inevitable as moving forward in time, and can actually be thought of as equivalent to doing so, depending on the spacetime coordinate system used.[2][3][4][5]
The surface at the Schwarzschild radius acts as an event horizon in a non-rotating body that fits inside this radius (although a rotating black hole operates slightly differently). The Schwarzschild radius of an object is proportional to its mass. Theoretically, any amount of matter will become a black hole if compressed into a space that fits within its corresponding Schwarzschild radius. For the mass of the Sun this radius is approximately 3 kilometers and for the Earth it is about 9 millimeters. In practice, however, neither the Earth nor the Sun has the necessary mass and therefore the necessary gravitational force, to overcome electron and neutron degeneracy pressure. The minimal mass required for a star to be able to collapse beyond these pressures is the Tolman-Oppenheimer-Volkoff limit, which is approximately three solar masses.
Black hole event horizons are especially noteworthy for three reasons. First, there are many examples near enough to study. Second, black holes tend to pull in matter from their environment, which provides examples where matter about to pass through an event horizon is expected to be observable. Third, the description of black holes given by general relativity is known to be an approximation and it is expected that quantum gravity effects become significant in the vicinity of the event horizon. This allows observations of matter in the vicinity of a black hole's event horizon to be used to indirectly study general relativity and proposed extensions to it.
Donc, je n'ai jamais parler d'un trou noir (black hole), c'est une anomalie spatiotemporelle que l'on peut notament observer autour d'un trou noir. Genre de truc pas façile a visualiser sur une table de jeux, pour simplifier je place un trou noir (impact visuel et objet spatiale connu de tous) en éxpliquant qu'il est trés loin de la zone des combats mais que sa présence lointaine provoque l'event horizon. En gros, je trouve ça plus joli qu'une bande noire marquée event horizon sur la table mais les gouts et les couleurs ne se discute pas ^^ en gros vivre et laisser vivre.
Re: gravity well et event horizon sur la table.
Non, un Horizon des Évènements, tu ne l'observes pas, ce que tu vois, c'est la matière gravitant autour de la Singularité et qui n'est pas encore aspirée par ladite Singularité, ce qui provoque le Disque d’Accrétion.
L'Horizon des Évènements permet juste de donner des limites à la Singularité afin de la "contenir", et un rayon de lumière, attiré par la Singularité, sera déformé avant de se retrouver dans la Singularité (à cause de l'Horizon des Évènements).
En terme de jeu, les règles de l'Horizon des Évènements s'explique par le fait que, non seulement le vaisseau est attiré par la Singularité elle-même, mais en plus la vison de l'équipage est erronée.
Pour le Gravity Well, il s'agit en fait du Champ de Gravité de la Singularité (Puit Gravimétrique, ça marche aussi), ce qui explique le fait que le vaisseau est attiré par la Singularité sans changer d'orientation.
Après, je trouves le matériel que tu utilises vraiment bien hein je voulais juste savoir ta définition de la chose, sans juger ni rien, juste pour apporter mes maigres connaissances un peu à tout le monde si vous ne saviez pas ce que sont ces choses aussi étranges que destructrices, afin d'aider, tout simplement
Par conséquent, si j'avais l'air un peu sec, je m'en excuse, car ce n'était pas mon intention.
Personnellement, je ferais les effets de la Singularité en jeu, mais pas la Singularité elle-même.
L'Horizon des Évènements permet juste de donner des limites à la Singularité afin de la "contenir", et un rayon de lumière, attiré par la Singularité, sera déformé avant de se retrouver dans la Singularité (à cause de l'Horizon des Évènements).
En terme de jeu, les règles de l'Horizon des Évènements s'explique par le fait que, non seulement le vaisseau est attiré par la Singularité elle-même, mais en plus la vison de l'équipage est erronée.
Pour le Gravity Well, il s'agit en fait du Champ de Gravité de la Singularité (Puit Gravimétrique, ça marche aussi), ce qui explique le fait que le vaisseau est attiré par la Singularité sans changer d'orientation.
Après, je trouves le matériel que tu utilises vraiment bien hein je voulais juste savoir ta définition de la chose, sans juger ni rien, juste pour apporter mes maigres connaissances un peu à tout le monde si vous ne saviez pas ce que sont ces choses aussi étranges que destructrices, afin d'aider, tout simplement
Par conséquent, si j'avais l'air un peu sec, je m'en excuse, car ce n'était pas mon intention.
Personnellement, je ferais les effets de la Singularité en jeu, mais pas la Singularité elle-même.
Mr. J- Psychopathe Aliéné
- Messages : 3038
Date d'inscription : 02/05/2011
Age : 39
Localisation : Ava (28)
Re: gravity well et event horizon sur la table.
...heuuu...!? y'a que moi qui pige que dalle là ou quoi?
Re: gravity well et event horizon sur la table.
desmoniak999 a écrit:...heuuu...!? y'a que moi qui pige que dalle là ou quoi?
Ok, j'ai compris, je sors par la fenêtre >>>[]
Mr. J, encore et toujours incompris... sick sad world
Mr. J- Psychopathe Aliéné
- Messages : 3038
Date d'inscription : 02/05/2011
Age : 39
Localisation : Ava (28)
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