Magnetosphere

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SINCE EARTH'S MAGNETOSPHERE HAS BEEN WEAKENING WITH CRACKS IN IT OFTEN THE SIZE OF CALIFORNIA MOSTLY NEAR THE POLES, AS IT CONTINUES TO WEAKEN PEOPLE SHOULD KNOW MORE ABOUT WHAT A MAGNETOSPHERE IS AND WHAT IS CAUSING OUR MAGNETOSPHERE TO CONTINUE TO DEGRADE? I DON'T HAVE A PROVEN ANSWER FOR YOU. HOWEVER, MY PRESENT THEORY FROM EVERYTHING I'VE STUDIED SO FAR IS THAT ONE POSSIBLE CAUSE IS BREAKING THE MAGNETIC FIELDS TO GENERATE ELECTRICITY.

PEOPLE SAY EVEN PHYSICISTS THAT, "ELECTRICITY COMES FROM YOUR NEAREST ELECTRICAL GENERATING STATION." HOWEVER, THAT DOESN'T ANSWER MY QUESTION OF "WHERE DOES ELECTRICITY COME FROM?" ANOTHER WAY TO LOOK AT IT IS ELECTRICITY IS STEALING THE ELECTRONS FROM ATOMS OF THE EARTH. ANOTHER WAY TO LOOK AT THIS IS THAT GENERATING ELECTRICITY BY BREAKING MAGNETIC FIELDS ALSO MIGHT BE DEPLETING OUR MAGNETOSPHERE. IF THIS IS TRUE THEN WE ARE MOVING TOWARDS BECOMING STERILE AS A HUMAN RACE BY GENERATING ELECTRICITY THIS WAY BECAUSE THE ONLY THING THAT ALLOWS ANIMALS AND HUMANS TO BE FERTILE AND TO HAVE CHILDREN IS THE MAGNETOSPHERE PROTECTING US FROM COSMIC RAYS WHICH WILL STERILIZE ANYONE EXPOSED TO THEM IN OUTER SPACE.

SO, WITHOUT A FUNCTIONING MAGNETOSPHERE WE WOULD ALL HAVE TO LIVE UNDERGROUND A MAJORITY OF THE TIME IN ORDER TO SUCCESSFULLY REPRODUCE. THIS IS ALREADY TRUE ON MARS WHICH MIGHT BE BECAUSE HUMANOIDS THAT WE SPRANG FORM (UP TO 50% OF PRESENT DAY GENETICS). SO, ON MARS NO ONE EVER GETS PREGNANT IF THEY LIVE ON THE SURFACE OF MARS AND NOT UNDERGROUND ALREADY. AND EARTH'S MAGNETOSPHERE IS MOVING QUICKLY TOWARDS BECOMING LIKE MARS. WHEN? I'M NOT SOMEONE WHO MATHEMATICALLY COULD PREDICT THIS. ASK SOMEONE WHO COULD PREDICT WHEN HUMANS WON'T BE ABLE TO REPRODUCE WHO LIVE ON THE SURFACE ALONG WITH LITERALLY ALL MAMMALS ON EARTH AT THAT POINT.

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MAGNETOSPHERE - WIKIPEDIA, THE FREE ENCYCLOPEDIA

en.WIKIPEDIA.org/WIKI/MAGNETOSPHEREWikipediaA "magnetosphere" is the area of space near an astronomical object in which charged particles are controlled by that object's magnetic field. Near the surface of...

MAGNETOSPHERE OF JUPITER

The magnetosphere of Jupiter is the cavity created in the solar...

LIST OF SATELLITES WHICH HAVE...

Below is a list of satellites which have provided data on the Earth...

MAGNETOSPHERE OF SATURN

The magnetosphere of Saturn is the cavity created in the flow of...

MAGNETOSPHERE PARTICLE MOTION

Magnetosphere particle motion. From Wikipedia, the free...

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MAGNETOPAUSE - WIKIPEDIA, THE FREE ENCYCLOPEDIA

en.WIKIPEDIA.org/WIKI/MAGNETOPAUSEWikipediaThe "magnetopause" is the abrupt boundary between a "magnetosphere" and the surrounding plasma. For planetary science, the "magnetopause" is the boundary...

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EARTH'S MAGNETIC FIELD - WIKIPEDIA, THE FREE ENCYCLOPEDIA

en.WIKIPEDIA.org/WIKI/Earth's magnetic fieldWikipediaJump to MAGNETOSPHERE - "Magnetosphere"[edit]. An artist's rendering of the structure of a "magnetosphere". 1) Bow shock. 2) Magnetosheath.Importance - Main characteristics - Magnetosphere - Time dependence

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MAGNETOSPHERIC ELECTRIC CONVECTION FIELD - WIKIPEDIA, THE...

en.WIKIPEDIA.org/WIKI/MAGNETOSPHERIC electric convection fi...WikipediaThe impact of the solar wind onto the "magnetosphere" generates an electric field within the inner "magnetosphere" (r < 10 a; with a the Earth's radius) - the...

MAGNETOSPHERE

From Wikipedia, the free encyclopedia"Play media A rendering of the magnetic field lines of Earth's magnetosphereA MAGNETOSPHERE is the area of space near an astronomical object in which charged particles are controlled by that object's magnetic field. Near the surface of the object, the magnetic field lines resemble those of a magnetic dipole. Farther away from the surface, the field lines are significantly distorted by electric currents flowing in the plasma (e.g. in ionosphere or solar wind). When speaking about Earth, magnetosphere" is typically used to refer to the outer layer of the ionosphere, although some sources consider the ionosphere and magnetosphere to be separate.

CONTENTS

* 1 History
* 2 Types of magnetospheres

* 3 Structure

* 3.1 Bow shock
* 3.2 Magnetosheath
* 3.3 Magnetopause
* 3.4 Magnetotail
* 3.5 Earth's magnetosphere
* 3.6 Other objects

* 4 See also
* 5 References

HISTORY

Main article: Magnetosphere chronologyStudy of Earth's magnetosphere began in 1600, when William Gilbert discovered that the magnetic field on the surface of Earth resembled that on a terrella, a small, magnetized sphere. In the 1940s, Walter M. Elsasser proposed the model of dynamo theory, which attributes Earth's magnetic field to the motion of Earth's iron outer core. Through the use of magnetometers, scientists were able to study the variations in Earth's magnetic field as functions of both time and latitude and longitude. Beginning in the late 1940s, rockets were used to study cosmic rays. In 1958, Explorer 1, the first of the Explorer series of space missions, was launched to study the intensity of cosmic rays above the atmosphere and measure the fluctuations in this activity. This mission observed the existence of the Van Allen radiation belt (located in the inner region of Earth's magnetosphere), with the Explorer 3 mission later that year definitively proving its existence. Also in 1958, Eugene Parker proposed the idea of the solar wind. In 1959, the term magnetosphere was proposed by Thomas Gold. The Explorer 12 mission in 1961 led to the observation by Cahill and Amazeen in 1963 of a sudden decrease in the strength of the magnetic field near the noon meridian, later named the magnetopause. In 1983, the International Cometary Explorer observed the magnetotail, or the distant magnetic field.

TYPES OF MAGNETOSPHERES

The structure and behavior of magnetospheres is dependent on several variables: the type of astronomical object, the nature of sources of plasma and momentum, the period of the object's spin, the nature of the axis whereabout the object spins, the axis of the magnetic dipole, and the magnitude and direction of the velocity of the flow of solar wind.

The distance at which a planet can withstand the solar wind pressure is called the Chapman-Ferraro distance. This is modeled by a formula wherein represents the radius of the planet, represents the magnetic field on the surface of the planet at the equator, and represents the velocity of the solar wind.

A magnetosphere is classified as "intrinsic" when, or when the primary opposition to the flow of solar wind is the magnetic field of the object. Mercury, Earth, Jupiter, Ganymede, Saturn, Uranus, and Neptune exhibit intrinsic magnetospheres. A magnetosphere is classified as "induced" when, or when the solar wind is not opposed by the object's magnetic field. In this case, the solar wind interacts with the atmosphere or ionosphere of the planet (or surface of the planet, if the planet has no atmosphere). Venus has an induced magnetic field. What this means is that because Venus appears to have no internal dynamo effect, the only magnetic field present is that formed by the solar wind's wrapping around the physical obstacle of Venus (see also Venus' Induced Magnetosphere). When, the planet itself and its magnetic field both contribute. It is possible that Mars is of this type.

STRUCTURE

An artist's rendering of the structure of a magnetosphere. 1) Bow shock. 2) Magnetosheath. 3) Magnetopause. 4) Magnetosphere. 5) Northern tail lobe. 6) Southern tail lobe. 7) Plasmasphere.

BOW SHOCK

Infrared image and artist's concept of the bow shock around R HydraeMain article: Bow shockThe bow shock forms the outermost layer of the magnetosphere: the boundary between the magnetosphere and the ambient medium. For stars, this is usually the boundary between the stellar wind and interstellar medium; for planets, the speed of the solar wind there plummets as it approaches the magnetopause.

MAGNETOSHEATH

Main article: MagnetosheathThe magnetosheath is the region of the magnetosphere between the bow shock and the magnetopause. It is formed mainly from shocked solar wind, though it contains a small amount of plasma from the magnetosphere. It is an area exhibiting high particle energy flux, where the direction and magnitude of the magnetic field varies erratically. This is caused by the collection of solar wind gas that has effectively undergone thermalization. It acts as a cushion that transmits the pressure from the flow of the solar wind and the barrier of the magnetic field from the object.

MAGNETOPAUSE

Main article: MagnetopauseThe magnetopause is the area of the magnetosphere wherein the pressure from the planetary magnetic field is balanced with the pressure from the solar wind. It is the convergence of the shocked solar wind from the magnetosheath with the magnetic field of the object and plasma from the magnetosphere. Because both sides of this convergence contain magnetized plasma, the interactions between them are very complex. The structure of the magnetopause depends upon the Mach number and beta of the plasma, as well as the magnetic field. The magnetopause changes size and shape as the pressure from the solar wind fluctuates.

MAGNETOTAIL

Opposite the compressed magnetic field is the magnetotail, where the magnetosphere extends far beyond the astronomical object. It contains two lobes, referred to as the northern and southern tail lobes. The northern tail lobe points towards the object and the southern tail lobe points away. The tail lobes are almost empty, with very few charged particles opposing the flow of the solar wind. The two lobes are separated by a plasma sheet, an area where the magnetic field is weaker and the density of charged particles is higher.[10]

EARTH'S MAGNETOSPHERE

Main article: Magnetic field of the Earth Artist's rendition of Earth's magnetosphere Diagram of Earth's magnetosphereOver Earth's equator, the magnetic field lines become almost horizontal, then return to connect back again at high latitudes. However, at high altitudes, the magnetic field is significantly distorted by the solar wind and its solar magnetic field. On the dayside of Earth, the magnetic field is significantly compressed by the solar wind to a distance of approximately 65,000 kilometers (40,000 mi). Earth's bow shock is about 17 kilometers (11 mi) thick[11] and located about 90,000 kilometers (56,000 mi) from Earth.[12] The magnetopause exists at a distance of several hundred kilometers off earth's surface. Earth's magnetopause has been compared to a sieve because it allows solar wind particles to enter. Kelvin-Helmholtz instabilities occur when large swirls of plasma travel along the edge of the magnetosphere at a different velocity from the magnetosphere, causing the plasma to slip past. This results in magnetic reconnection, and as the magnetic field lines break and reconnect, solar wind particles are able to enter the magnetosphere.[13] On Earth's nightside, the magnetic field extends in the magnetotail, which lengthwise exceeds 6,300,000 kilometers (3,900,000 mi). Earth's magnetotail is the primary source of the polar aurora.[10] Also, NASA scientists have suggested or "speculated" that Earth's magnetotail can cause "dust storms" on the Moon by creating a potential difference between the day side and the night side.[14]

OTHER OBJECTS

The magnetosphere of Jupiter is the largest planetary magnetosphere in the Solar System, extending up to 7,000,000 kilometers (4,300,000 mi) on the dayside and almost to the orbit of Saturn on the nightside.[15] Jupiter's magnetosphere is stronger than Earth's by an order of magnitude, and its magnetic moment is approximately 18,000 times larger.[16]

SEE ALSO

" Geomagnetism" - Wikipedia book

* Solar wind
* Plasma physics

REFERENCES

* "Magnetospheres". "NASA Science". NASA.
* Ratcliffe, John Ashworth (1972). "An Introduction to the Ionosphere and Magnetosphere". CUP Archive. ISBN 9780521083416.
* "Ionosphere and magnetosphere". "Encyclopedia Britannica". Encyclopedia Britannica, Inc. 2012.
* Van Allen, James Alfred (2004). "Origins of Magnetospheric Physics". Iowa City, Iowa, USA: University of Iowa Press. ISBN 9780877459217. OCLC 646887856.