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Author: Dennis Brooks
Publisher: Speedy Publishing LLC
ISBN: 168127485X
Category : Science
Languages : en
Pages : 68
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Book Description
The Old Theory Until now, there was only one theory regarding the source of Earth's magnetic field, which is the internal dynamo theory. This theory was accepted because it offered the best explanation at the time. Also, much research has been done to support the theory. According to the internal dynamo theory, a dynamo near the center of the planet generates the current that produces the magnetic field. This dynamo would be in the liquid outer core of the planet. It would produce the magnetic axis and project it from the planet. The axis would expand and spread the magnetic field around the planet. This theory also suggests that the internal dynamo is sustaining itself by using fuel from Earth's core. The internal dynamo theory has changed over the years. At first scientists thought that a bar magnet was in the center of the planet and the compass needle pointed to the poles of that magnet. This made perfect sense at the time because we can see that the same thing happens when we put a compass near a bar magnet. The Bar Magnet In The Sun image demonstrates the idea of the bar magnet theory. However, this example shows the bar magnet imbedded within the sun because just like the planets, the sun also has a magnetic field, which is more complex than Earth's magnetic field. Scientists have tried to use the internal dynamo theory to explain the magnetic fields of all the planets, some moons, and the sun. However, the old model does not work for the sun, moon, and other planets. The bar magnet concept lasted a long time as the main theory regarding the source of Earth's magnetic field. However, while trying to apply it to other cases, scientists found problems with the theory. Over the years, they discovered that a bar magnet could not hold magnetism above the temperature of 770 degrees centigrade because high heat destroys magnetism. This caused the theory to gradually evolve over time.
Author: Dennis Brooks
Publisher: Speedy Publishing LLC
ISBN: 168127485X
Category : Science
Languages : en
Pages : 68
Get Book
Book Description
The Old Theory Until now, there was only one theory regarding the source of Earth's magnetic field, which is the internal dynamo theory. This theory was accepted because it offered the best explanation at the time. Also, much research has been done to support the theory. According to the internal dynamo theory, a dynamo near the center of the planet generates the current that produces the magnetic field. This dynamo would be in the liquid outer core of the planet. It would produce the magnetic axis and project it from the planet. The axis would expand and spread the magnetic field around the planet. This theory also suggests that the internal dynamo is sustaining itself by using fuel from Earth's core. The internal dynamo theory has changed over the years. At first scientists thought that a bar magnet was in the center of the planet and the compass needle pointed to the poles of that magnet. This made perfect sense at the time because we can see that the same thing happens when we put a compass near a bar magnet. The Bar Magnet In The Sun image demonstrates the idea of the bar magnet theory. However, this example shows the bar magnet imbedded within the sun because just like the planets, the sun also has a magnetic field, which is more complex than Earth's magnetic field. Scientists have tried to use the internal dynamo theory to explain the magnetic fields of all the planets, some moons, and the sun. However, the old model does not work for the sun, moon, and other planets. The bar magnet concept lasted a long time as the main theory regarding the source of Earth's magnetic field. However, while trying to apply it to other cases, scientists found problems with the theory. Over the years, they discovered that a bar magnet could not hold magnetism above the temperature of 770 degrees centigrade because high heat destroys magnetism. This caused the theory to gradually evolve over time.
Author: Dennis Brooks
Publisher:
ISBN: 9780741401649
Category : Geomagnetism
Languages : en
Pages : 0
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Book Description
Researchers first thought a huge magnet ran through the planet. Next, they thought there was a dynamo in the inner core. Then, they thought a dynamo might exist in the outer core of the planet. Recently, scientists have been studying the dynamo that is found with every planet that has a magnetic field. This research has shown that the outer dynamo system is the source of the magnetic field. The magnetic field of each planet (Earth, Jupiter, Saturn, Uranus, and Neptune) is produced by the ring currents in the radiation belts. Each planet is a component of the dynamo system that produces the magnetic field.
Author: Gillian M. Turner
Publisher: The Experiment
ISBN: 1615190317
Category : Science
Languages : en
Pages : 290
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Book Description
Discusses the issues of geomagnetism, including why the Earth's magnetic north differs from its geographic north, how animals use geomagnetism for migration purposes, and the source of the magnetic field.
Author: Wallace H. Campbell
Publisher: Elsevier
ISBN: 0080504906
Category : Science
Languages : en
Pages : 180
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Book Description
An introductory guide to global magnetic field properties, Earth Magnetism addresses, in non-technical prose, many of the frequently asked questions about Earth's magnetic field. Magnetism surrounds and penetrates our Earth in ways basic science courses can rarely address. It affects navigation, communication, and even the growth of crystals. As we observe and experience an 11-year solar maximum, we may witness spectacular satellite-destroying solar storms as they interact with our magnetic field. Written by an acknowledged expert in the field, this book will enrich courses in earth science, atmospheric science, geology, meteorology, geomagnetism, and geophysics. Contains nearly 200 original illustrations and eight pages of full-color plates. * Largely mathematics-free and with a wide breadth of material suitable for general readers* Integrates material from geomagnetism, paleomagnetism, and solar-terrestrial space physics.* Features nearly 200 original illustrations and 4 pages of colour plates
Author: Keith L. McDonald
Publisher:
ISBN:
Category : Cosmic magnetic fields
Languages : en
Pages : 100
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Book Description
Author: Keith L. McDonald
Publisher:
ISBN:
Category : Geomagnetism
Languages : en
Pages : 108
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Book Description
Author: McElhinny
Publisher: Academic Press
ISBN: 0080954634
Category : Science
Languages : en
Pages : 400
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Book Description
The Earth's Magnetic Field : Its History, Origin, and Planetary Perspective
Author: Sydney Chapman
Publisher:
ISBN:
Category : Geomagnetism
Languages : en
Pages : 148
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Book Description
Author: Louis Proud
Publisher: Simon and Schuster
ISBN: 1620551659
Category : Body, Mind & Spirit
Languages : en
Pages : 408
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Book Description
The Moon is not a cold, dead rock but a rich, fascinating world just as alive as Earth • Investigates the Moon as the home of an alien intelligence who controls humanity • Examines several of NASA’s Apollo missions and the findings they concealed • Reveals the many holes in the “Giant Impact” theory about the Moon’s origins and the evidence for a hollow, artificial Moon • Explores the deep influence of the Moon on the collective mind of humanity and occult teachings about the Moon from the Qabbalah, tarot, and other sources Despite being the most prominent celestial body after the Sun, the Moon has many qualities that science has yet to explain. Lunar rock samples reveal the Moon once had a magnetic field like the Earth, and seismic experiments by NASA suggest the Moon is at least partially hollow. For centuries people have observed lights, moving clouds and shadows, and even the disappearance of entire craters via telescope. Apollo astronauts repeatedly felt the presence of a “non-human intelligence” during their Moon visits, and many indigenous traditions speak of malevolent visitors from the Moon. A growing body of astrophysical and geological evidence shows the Moon is not an entirely natural world--that someone or something altered it long ago. Louis Proud explores the phases and movements of the Moon along with its ancient and mysterious features--its craters, maria, rilles, tunnels, and domes. He examines several of NASA’s Apollo missions, showing not that NASA faked the Moon expeditions but that they concealed what the astronauts found there. He explains the many holes in the commonly accepted “Giant Impact” theory of the Moon’s origins and reveals the evidence for a hollow, artificial Moon placed in orbit eons ago to observe Earth. Examining the deep influence of the Moon on the collective mind of humanity, Proud looks at what the Qabbalah, the tarot, and other occult traditions say about the Moon and interprets G. I. Gurdjieff’s teachings that “we are food for the Moon.” He investigates the Moon as a gateway to another realm, as the Purgatory of Christianity, and as the home of an alien intelligence who controls and exploits humanity. Examining the Moon from both scientific and esoteric perspectives, Proud shows the Moon is not a cold, dead rock but a rich, fascinating world just as alive as Earth.
Author: Alanna Mitchell
Publisher: Penguin
ISBN: 1101985186
Category : Science
Languages : en
Pages : 336
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Book Description
The mystery of Earth's invisible, life-supporting power Alanna Mitchell's globe-trotting history of the science of electromagnetism and the Earth's magnetic field--right up to the latest indications that the North and South Poles may soon reverse, with apocalyptic results--will soon change the way you think about our planet. Award-winning journalist Alanna Mitchell's science storytelling introduce intriguing characters--from the thirteenth-century French investigations into magnetism and the Victorian-era discover that electricity and magnetism emerge from the same fundamental force to the latest research. No one has ever told so eloquently how the Earth itself came to be seen as a magnet, spinning in space with two poles, and that those poles have dramatically reversed many time, often coinciding with mass extinctions. The most recent reversal was 780,000 years ago. Mitchell explores indications that the Earth's magnetic force field is decaying faster than previously thought. When the poles switch, a process that takes many years, the Earth is unprotected from solar radiation storms that would, among other disturbances, wipe out much and possible all of our electromagnetic technology. Navigation for all kinds of animals is disrupted without a stable, magnetic North Pole. But can you imagine no satellites, no Internet, no smartphones--maybe no power grids at all? Alanna Mitchell offers a beautifully crafted narrative history of surprising ideas and science, illuminating invisible parts of our own planet that are constantly changing around us.
