Gravitational waves - Revision history

Dchiodo3 at 17:45, 17 April 2016

2016-04-17T17:45:01Z

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	Gravitational waves are waves in the curvature of space-time believed to be emanating from gravity wells. They have no been directly observed. The gradual decay in angular momentum over the course of time in a orbital system can be attributed to the emission of gravitational waves.		Gravitational waves are waves in the curvature of space-time believed to be emanating from gravity wells. They have now been directly observed. The gradual decay in angular momentum over the course of time in a orbital system can be attributed to the emission of gravitational waves.

	[[File:Graviational waves.jpg\|thumb\|While gravitational waves emit no light, here they can be visualized traveling through space-time.]]		[[File:Graviational waves.jpg\|thumb\|While gravitational waves emit no light, here they can be visualized traveling through space-time.]]

Dchiodo3 at 17:44, 17 April 2016

2016-04-17T17:44:32Z

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	Gravitational waves are waves in the curvature of space-time believed to be emanating from gravity wells. ~~While they~~ have ~~not~~ been ''directly'' observed~~, they can be indirectly observed as the loss in energy of binary system, such as a star orbiting a planet or another star~~. The gradual decay in angular momentum over the course of time in a orbital system can be attributed to the emission of gravitational waves.		Gravitational waves are waves in the curvature of space-time believed to be emanating from gravity wells. They have no been directly observed. The gradual decay in angular momentum over the course of time in a orbital system can be attributed to the emission of gravitational waves.

	[[File:Graviational waves.jpg\|thumb\|While gravitational waves emit no light, here they can be visualized traveling through space-time.]]		[[File:Graviational waves.jpg\|thumb\|While gravitational waves emit no light, here they can be visualized traveling through space-time.]]

Dchiodo3: /* Orbital Decay */

2015-12-06T02:27:09Z

Orbital Decay

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	[[Image:orbit5.gif\|thumb\|200px\|Two stars start out in highly elliptical orbits.]]		[[Image:orbit5.gif\|thumb\|200px\|Two stars start out in highly elliptical orbits.]]
	[[Image:orbit1.gif\|thumb\|200px\|The two stars' orbits now have decayed to the point where they are on and the same around their common center of mass.]]		[[Image:orbit1.gif\|thumb\|200px\|The two stars' orbits now have decayed to the point where they are one and the same around their common center of mass.]]

Dchiodo3: /* Connectedness */

2015-12-06T02:26:01Z

Connectedness

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	==Connectedness==		==Connectedness==

	How objects move through space has always fascinated me, especially due to the scale and the speed of celestial objects. As an Aerospace Engineering Major, I am much more interested in how we can learn about propulsion and energy just by observing the interactions of objects in the cosmos. By learning more about space-time, we could potentially develop methods of propelling our machines deeper into space than we previously thought possible. NASA and the ESA have already put extensive resources into studying gravitational waves in hopes that by unlocking their secrets, ~~and~~ we could learn how to harness their power into future engineering projects.		How objects move through space has always fascinated me, especially due to the scale and the speed of celestial objects. As an Aerospace Engineering Major, I am much more interested in how we can learn about propulsion and energy just by observing the interactions of objects in the cosmos. By learning more about space-time, we could potentially develop methods of propelling our machines deeper into space than we previously thought possible. NASA and the ESA have already put extensive resources into studying gravitational waves in hopes that by unlocking their secrets, we could learn how to harness their power into future engineering projects.

	== See also ==		== See also ==

Dchiodo3: /* History */

2015-12-06T02:25:30Z

History

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	Albert Einstein first theorized about gravitational waves in his Theory of General Relativity. He hypthesized that as a gravity well moves through space-time, it would emit a "wake," of energy much like a boat leaves a wake behind it in the water.		Albert Einstein first theorized about gravitational waves in his Theory of General Relativity. He hypthesized that as a gravity well moves through space-time, it would emit a "wake," of energy much like a boat leaves a wake behind it in the water.

	In 1993, the Nobel Prize in Physics was awarded for the observations of the Hulse-Taylor star system, which provided some concrete evidence for the existence of gravitational waves.		In 1993, the Nobel Prize in Physics was awarded for the observations of the Hulse-Taylor star system, which provided some concrete evidence for the existence of gravitational waves. Observations made included the rate of change in the orbits of the two stars as they underwent orbital decay.

	On December 3, 2015, the European Space Agency launched a test probe, named LISA, designed to orbit at the L1 Lagrange Point and measure gravitational waves by measuring the relative positions of released gold-platinum cubes with high precision lasers. If gravitational waves do exist, then the the positions of the cubes should be several billionths of a millimeter off from free fall.		On December 3, 2015, the European Space Agency launched a test probe, named LISA, designed to orbit at the L1 Lagrange Point and measure gravitational waves by measuring the relative positions of released gold-platinum cubes with high precision lasers. If gravitational waves do exist, then the the positions of the cubes should be several billionths of a millimeter off from free fall.

Dchiodo3 at 02:24, 6 December 2015

2015-12-06T02:24:39Z

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	Albert Einstein explained gravity in his theory of general relativity as a phenomenon resulting from the curvature of space-time. This curvature is caused by a mass distorting and bending the space-time in its sphere of influence. The gravitational waves radiate outward from the gravity well, and travel at the speed of light. These waves occur through the fabric of space-time much like mechanical waves travel through a fluid. As a gravitational wave passes an observer, it slightly alters the distance between the observer and the mass of origin by a factor of billionths of a millimeter.		Albert Einstein explained gravity in his theory of general relativity as a phenomenon resulting from the curvature of space-time. This curvature is caused by a mass distorting and bending the space-time in its sphere of influence. The gravitational waves radiate outward from the gravity well, and travel at the speed of light. These waves occur through the fabric of space-time much like mechanical waves travel through a fluid. As a gravitational wave passes an observer, it slightly alters the distance between the observer and the mass of origin by a factor of billionths of a millimeter.

			In order to understand this theory, think about a two-dimensional field, such as the ocean's surface. As a small speedboat travels across the water, it distorts the surface, causing ripples to travel perpendicular to its momentum. A larger ship would produce stronger waves, which would carry more energy. Gravitational waves are the three-dimensional counterpart to this analogy. The speedboat represents a planet, and the ship represents a star. The object of greater mass produces stronger gravitational waves. If the propulsion of the ship suddenly shut down, the ship would gradually slow down until its velocity was zero, due to the energy transfer from the movement of the ship to the water. As a planet or star moves through space, it too is slowing down due to the energy transfer to space-time in the form of gravitational waves.

	==History==		==History==

Dchiodo3: /* References */

2015-12-06T02:16:37Z

References

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			All You Need to Know About Gravitational Waves : Nature News & Comment. (n.d.). Retrieved December 5, 2015,

	~~Thorne, Kip S~~. (~~1995~~). ~~"Gravitational Waves"~~. ~~arXiv:gr~~-~~qc/9506086~~		Gravitational waves and where to find them \| symmetry magazine. (n.d.). Retrieved from [http://www.symmetrymagazine.org/article/gravitational-waves-and-where-to-find-them]

	~~Clavin~~, ~~Whitney~~ (~~30 January 2015~~). ~~"Gravitational Waves~~ from ~~Early Universe Remain Elusive"~~. ~~NASA~~
			Gravitational Waves in General Relativity. VII. Waves from Axi-Symmetric Isolated Systems \| Proceedings of the Royal Society of London A: Mathematical, Physical and Engineering Sciences. (n.d.). Retrieved from [http://rspa.royalsocietypublishing.org/content/269/1336/21.short]

Dchiodo3: /* References */

2015-12-06T02:13:34Z

References

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	DISCLAIMER: ALL IMAGES AND GIFS WERE TAKEN FROM THE PUBLIC DOMAIN FOR THIS PAGE. I DO NOT OWN ANY OF THE CONTENT.		DISCLAIMER: ALL IMAGES AND GIFS WERE TAKEN FROM THE PUBLIC DOMAIN FOR THIS PAGE. I DO NOT OWN ANY OF THE CONTENT.

	~~[[Category~~:~~Which Category did you place this in?]]~~

			Thorne, Kip S. (1995). "Gravitational Waves". arXiv:gr-qc/9506086

			Clavin, Whitney (30 January 2015). "Gravitational Waves from Early Universe Remain Elusive". NASA

Dchiodo3: /* External links */

2015-12-06T01:26:05Z

External links

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	[http://m.esa.int/Our_Activities/Space_Science/LISA_Pathfinder_en_route_to_gravitational_wave_demonstration "LISA Pathfinder En Route to Gravitational Wave Demonstration / Space Science / Our Activities / ESA Mobile." European Space Agency. N.p., n.d. Web. 5 Dec. 2015.]		[http://m.esa.int/Our_Activities/Space_Science/LISA_Pathfinder_en_route_to_gravitational_wave_demonstration "LISA Pathfinder En Route to Gravitational Wave Demonstration / Space Science / Our Activities / ESA Mobile." European Space Agency. N.p., n.d. Web. 5 Dec. 2015.]

	===~~External links~~===		===Also on PhysicsBook===

	[http://www.physicsbook.gatech.edu/Einstein%27s_Theory_of_General_Relativity Einstein's Theory of General Relativity]		[http://www.physicsbook.gatech.edu/Einstein%27s_Theory_of_General_Relativity Einstein's Theory of General Relativity]

	[http://www.physicsbook.gatech.edu/Albert_Einstein Albert Einstein]		[http://www.physicsbook.gatech.edu/Albert_Einstein Albert Einstein]

			[http://www.physicsbook.gatech.edu/Gravitational_Potential_Energy Gravitational Potential Energy]

	==References==		==References==

Dchiodo3: /* External links */

2015-12-06T01:24:03Z

External links

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	[http://www.physicsbook.gatech.edu/Einstein%27s_Theory_of_General_Relativity Einstein's Theory of General Relativity]		[http://www.physicsbook.gatech.edu/Einstein%27s_Theory_of_General_Relativity Einstein's Theory of General Relativity]

			[http://www.physicsbook.gatech.edu/Albert_Einstein Albert Einstein]

	==References==		==References==