Earth's Magnetic Field

Universe

the totality of known or supposed objects and phenomena throughout space; the cosmos; macrocosm.

Earth

the planet third in order from the sun, having an equatorial diameter of 7,926 miles (12,755 km) and a polar diameter of 7,900 miles (12,714 km), a mean distance from the sun of 92.9 million miles (149.6 million km), and a period of revolution of 365.26 days, and having one satellite.

Sun

the star that is the central body of the earth's solar system, around which the planets revolve and from which they receive light and heat: its mean distance from the earth is about 93 million miles (150 million km), its diameter about 864,000 miles (1.4 million km), and its mass about 330,000 times that of the earth; its period of surface rotation is about 25 days at its equator but longer at higher latitudes.

Milky Way Galaxy

The Milky Way is the galaxy that includes the Solar System, with the name describing the galaxy's appearance from Earth: a hazy band of light seen in the night sky formed from stars that cannot be individually distinguished by the naked eye.

Solar System

the sun together with all the planets and other bodies that revolve around it.

Solar Neighborhood

The solar neighborhood is the region around our sun that includes stars, gas, and other interstellar matter. It's a cylinder-shaped area centered on the sun and perpendicular to the Milky Way's disk

Magnetosphere

the outer region of the earth's ionosphere, where the earth's magnetic field controls the motion of charged particles, as in the Van Allen belts.

Non Contact Force

A non-contact force is a force which acts on an object without coming physically in contact with it. The most familiar non-contact force is gravity, which confers weight. In contrast, a contact force is a force which acts on an object coming physically in contact with it.

Magnet

a body, as a piece of iron or steel, that possesses the property of attracting certain substances, as iron.

Dipolar

Definitions of dipolar. adjective. having equal and opposite electric charges or magnetic poles having opposite signs and separated by a small distance.

Magnetism

the properties of attraction possessed by magnets; the molecular properties common to magnets.

Magnetic Field Lines

invisible lines of force that extend between the poles of the magnetic object.

Iron Filings

small particles of iron produced by filing or a similar mechanical process.

Electromagnet

a device consisting of an iron or steel core that is magnetized by electric current in a coil that surrounds it.

Electric Current

the time rate of flow of electric charge, in the direction that a positive moving charge would take and having magnitude equal to the quantity of charge per unit time: measured in amperes.

Electromagnetic

of or relating to electromagnetism or electromagnetic fields.