The Earth

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In the Solar System, the Earth is the third planet of eight considering its distance from the Sun. It is one of the smallest, with a radius of about 3.945 miles (6350 km).

Structure of the Earth

The story starts five billion years ago, when the immense amount of caloric energy generated by a high-velocity bombardment of meteorites and comets melted the entire planet. Different processes led to [...]

Rotation

Earth's rotation can be defined as the rotatory motion of the Earth with respect to its center of mass. While traveling around the Sun, our planet is spinning west to [...]

Revolution

Revolution is defined as the rotatory motion of a celestial body around another. The complete revolution of the Earth’s orbit around the sun takes 365 ¼ days, which explains the [...]

Tilt

The Earth’s tilt is the angle at which the Earth’s axis is leaning with respect to the Sun. The Earth’s axis is not perpendicular to its orbital plane: it [...]

Magnetic Field

It is defined as a magnetic shell that surrounds the planet. It is asymmetrically shaped, as it is delimited by the pressure of the solar wind, in the direction of [...]

Van Allen Belts

The Van Allen Belts were discovered in the late 1950s, and surround the Earth representing two regions of a particularly high concentration of charged particles. The inner belt occupies a [...]