Gravitational Force in Space and Other Applications - Revision history

Rwalsh40: /* History */

2020-04-29T03:41:21Z

History

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	[[File:grtest1.png\|400px\|thumb\|right\|An image depicting how light is deflected around massive bodies, causing us to view objects at an 'apparent' position that differs from their actual positon.]]		[[File:grtest1.png\|400px\|thumb\|right\|An image depicting how light is deflected around massive bodies, causing us to view objects at an 'apparent' position that differs from their actual positon.]]

			As we know now, however, there are some slight discrepancies between observations and Newton's theory that couldn't be explained prior to the work of Albert Einstein. These discrepancies could, primarily, be noted in Space. One of these, for example, was an issue that arose in the way that Mercury's orbit changed over time. Simply put, there were some perturbations in the orbit that simply could not be explained by Newton's theory of gravity. This issue was first noted in 1859 by Le Verrier (who had also used gravity to predict the existence of Neptune, in fact). These precessions would not be fully explained until the early twentieth century (1915ish) when Albert Einstein first proposed the theory of relativity. Furthermore, the deflection of light around massive bodies such as the Sun, as can be seen in the diagram to the right, although somewhat predicted by Newton's theories, occurred to a much greater degree than Newton had predicted. However, these discrepancies were perfectly in accordance with general relativity. It was in 1919 that Eddington measured these deflections.

	==See Also==		==See Also==

Rwalsh40: /* History */

2020-04-29T03:40:30Z

History

← Older revision		Revision as of 23:40, 28 April 2020
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	[[File:grtest1.png\|400px\|thumb\|right\|An image depicting how light is deflected around massive bodies, causing us to view objects at an 'apparent' position that differs from their actual positon.]]		[[File:grtest1.png\|400px\|thumb\|right\|An image depicting how light is deflected around massive bodies, causing us to view objects at an 'apparent' position that differs from their actual positon.]]
	As we know now, however, there are some slight discrepancies between observations and Newton's theory that couldn't be explained prior to the work of Albert Einstein. These discrepancies could, primarily, be noted in Space. One of these, for example, was an issue that arose in the way that Mercury's orbit changed over time. Simply put, there were some perturbations in the orbit that simply could not be explained by Newton's theory of gravity. This issue was first noted in 1859 by Le Verrier (who had also used gravity to predict the existence of Neptune, in fact). These precessions would not be fully explained until the early twentieth century (1915ish) when Albert Einstein first proposed the theory of relativity. Furthermore, the deflection of light around massive bodies such as the Sun, as can be seen in the diagram to the right, although somewhat predicted by Newton's theories, occurred to a much greater degree than Newton had predicted. These discrepancies, however, were perfectly in accordance with general relativity. It was in 1919 that Eddington measured these deflections.

	==See Also==		==See Also==

Rwalsh40 at 03:40, 29 April 2020

2020-04-29T03:40:08Z

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	Newton's Law of Gravity speaks on this force in a very refined way. It states that matter will experience some feeling if it is charged or not. Gravity depends on the two objects that are affected and the distance between them. So, it does not rely on the density or chemical structure of the matter involved. Matter with the same mass as the Sun will have an equal gravitational effect on the Earth as the Sun itself.		Newton's Law of Gravity speaks on this force in a very refined way. It states that matter will experience some feeling if it is charged or not. Gravity depends on the two objects that are affected and the distance between them. So, it does not rely on the density or chemical structure of the matter involved. Matter with the same mass as the Sun will have an equal gravitational effect on the Earth as the Sun itself.

			Larger amounts of mass create a higher amount of gravitational force. This relates to acceleration: heavier objects tend to produce better acceleration rates than lighter objects. Gravity’s relationship with distance is opposite: gravity decreases as the distance becomes larger. The confusion with this is that gravity never reaches zero because it has infinite range. Stars feel the gravity from different stars and galaxies feel gravity from other galaxies. The constantly appealing gravity can act over the biggest separations known to man.


	==Examples==		==Examples==

Rwalsh40 at 03:26, 29 April 2020

2020-04-29T03:26:15Z

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	A more rigorous approach (with mass in solar masses, and <math>M_{total}</math> representing the total mass of the two bodies) provides the following equation:		A more rigorous approach (with mass in solar masses, and <math>M_{total}</math> representing the total mass of the two bodies) provides the following equation:
	::*<math>(M_{total})P^2=a^3</math>		::*<math>(M_{total})P^2=a^3</math>

			Newton's Law of Gravity speaks on this force in a very refined way. It states that matter will experience some feeling if it is charged or not. Gravity depends on the two objects that are affected and the distance between them. So, it does not rely on the density or chemical structure of the matter involved. Matter with the same mass as the Sun will have an equal gravitational effect on the Earth as the Sun itself.

	==Examples==		==Examples==

Lduffy8: /* Hard */

2019-07-01T21:23:26Z

Hard

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	===Hard===		===Hard===
			[http://physicsbook.gatech.edu/Gravitational_Force#Difficult Please see this problem, listed generally under the gravitational force page.]

	==Connectedness==		==Connectedness==

Lduffy8: /* See Also */

2019-07-01T21:18:50Z

Lduffy8: /* See Also */

2019-07-01T21:16:04Z

Lduffy8: /* Connectedness */

2019-07-01T21:13:40Z

Connectedness

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	I am a physics major, specifically concentrating in astrophysics, and thus this knowledge is extremely applicable to me. I do research in classical dynamics in space, and thus gravitational interactions are incredibly important to consider in my research. More broadly, however, the knowledge of how the planets move and their gravity can be used when conceptualizing how to send spacecraft in the most efficient way to other places in the solar system. Lots of launches make use of so-called [https://en.wikipedia.org/wiki/Gravity_assist gravity assist] maneuvers in order to get to the planet or body in question in the quickest possible manner without utilizing too much fuel.		I am a physics major, specifically concentrating in astrophysics, and thus this knowledge is extremely applicable to me. I do research in classical dynamics in space, and thus gravitational interactions are incredibly important to consider in my research. More broadly, however, the knowledge of how the planets move and their gravity can be used when conceptualizing how to send spacecraft in the most efficient way to other places in the solar system. Lots of launches make use of so-called [https://en.wikipedia.org/wiki/Gravity_assist gravity assist] maneuvers in order to get to the planet or body in question in the quickest possible manner without utilizing too much fuel.

	GPS devices also make use of the notion of relativity in order to locate their targets. Without considering general relativity (which takes into account gravity in space), GPS devices would not function as planned and would be impossible to use.		[http://www.astronomy.ohio-state.edu/~pogge/Ast162/Unit5/gps.html GPS devices] also make use of the notion of relativity in order to locate their targets. Without considering general relativity (which takes into account gravity in space), GPS devices would not function as planned and would be impossible to use.

	==History==		==History==

Lduffy8: /* Connectedness */

2019-07-01T21:13:12Z

Connectedness

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	==Connectedness==		==Connectedness==
	Space has always fascinated me, starting from my time as a little kid. Looking up at the stars and wondering how they came to be and how they move has always been a part of my life. Knowing how gravity works at a massive level helps to further my understanding and quench my thirst for knowledge with regards to the stars.		Space has always fascinated me, starting from my time as a little kid. Looking up at the stars and wondering how they came to be and how they move has always been a part of my life. Knowing how gravity works at a massive level helps to further my understanding and quench my thirst for knowledge with regards to the stars.

			I am a physics major, specifically concentrating in astrophysics, and thus this knowledge is extremely applicable to me. I do research in classical dynamics in space, and thus gravitational interactions are incredibly important to consider in my research. More broadly, however, the knowledge of how the planets move and their gravity can be used when conceptualizing how to send spacecraft in the most efficient way to other places in the solar system. Lots of launches make use of so-called [https://en.wikipedia.org/wiki/Gravity_assist gravity assist] maneuvers in order to get to the planet or body in question in the quickest possible manner without utilizing too much fuel.

			GPS devices also make use of the notion of relativity in order to locate their targets. Without considering general relativity (which takes into account gravity in space), GPS devices would not function as planned and would be impossible to use.

	==History==		==History==

Lduffy8: /* Connectedness */

2019-07-01T21:09:38Z

Connectedness

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	==Connectedness==		==Connectedness==
			Space has always fascinated me, starting from my time as a little kid. Looking up at the stars and wondering how they came to be and how they move has always been a part of my life. Knowing how gravity works at a massive level helps to further my understanding and quench my thirst for knowledge with regards to the stars.

	==History==		==History==
	Isaac Newton made the connection between what keeps the planets rotating around the Sun and what keeps us standing on the Earth. In 1687, when the ''Principia'' was published, Newton noted that the force that held the planets on their orbits, and the force that kept the moon on its orbit around the Sun, must be the same.		Isaac Newton made the connection between what keeps the planets rotating around the Sun and what keeps us standing on the Earth. In 1687, when the ''Principia'' was published, Newton noted that the force that held the planets on their orbits, and the force that kept the moon on its orbit around the Sun, must be the same.

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	::*[https://www.science.org.au/curious/space-time/gravity This link] provides a general timeline of gravity, and dives into some basics of relativity with helpful diagrams.		::*[https://www.science.org.au/curious/space-time/gravity This link] provides a general timeline of gravity, and dives into some basics of relativity with helpful diagrams.
	::*[http://www.astronomy.ohio-state.edu/~pogge/Ast162/Unit5/gps.html Here, one can find] a helpful article detailing how GPS Systems are, in fact, proof of the concept of general relativity.		::*[http://www.astronomy.ohio-state.edu/~pogge/Ast162/Unit5/gps.html Here, one can find] a helpful article detailing how GPS Systems are, in fact, proof of the concept of general relativity.
			::*[https://en.wikipedia.org/wiki/History_of_gravitational_theory A general overview] of the history of gravitational theory.
			::*[http://hyperphysics.phy-astr.gsu.edu/hbase/grav.html#grav Hyperphysics] page describing a general overview of gravity.

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	==See Also==		==See Also==
			::*[https://www.science.org.au/curious/space-time/gravity This link] provides a general timeline of gravity, and dives into some basics of relativity with helpful diagrams.
			::*[http://www.astronomy.ohio-state.edu/~pogge/Ast162/Unit5/gps.html Here, one can find] a helpful article detailing how GPS Systems are, in fact, proof of the concept of general relativity.