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The Earth's field is completely invisible, but it can be felt by a compass needle on the Earth's … So other planets have it too! In general, the existence of a magnetic field was not considered particularly important. The magnetic field of Earth protects the life of Earth from the harmful cosmic radiation and charged particles emitted from the Sun. Yet we don’t really know what produces it, and there are many, many aspects of it which are a complete mystery. Posted on Thursday, 3 January, 2013 | 6 comments Columnist: William B Stoecker [!gad]The Earth’s magnetic field makes compasses function and shields us from dangerous solar radiation. Every few years, scientist Larry Newitt of the Geological Survey of Canada goes hunting.
Earth's magnetic field has flipped many times over the last billion years, according to the geologic record. Our planet's magnetic field is in a constant state of change, say researchers who are beginning to understand how it behaves and why. A compass works the way it does because Earth has a magnetic field that looks a lot like the one in a magnet.
Birds, turtles and other creatures also use the magnetic field of Earth to navigate. Earth's magnetic field is a magnetic field that emanates from Earth's core and encircles the Earth. In effect, the navigation systems and mapping functions in smartphones may be affected. The entire planet Earth would easily fit under the archway formed by the magnetic field loop. We can see these loops of magnetism on the sun because very hot gases flow along them and light them up! For a long time, the existence of a magnetic field in our planet seemed something completely natural – they say that a cat has four legs, a horse eats oats and hay, and the Earth has a magnetic field.
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