Daily Archives: April 13, 2008

The Seasons and Axis Tilt

The Earth’s seasons are not caused by the differences in the distance from the Sun throughout the year (these differences are extremely small). The seasons are the result of the tilt of the Earth’s axis. The Earth’s axis is tilted … Continue reading

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Aurora Borealis

Auroras (North/South Polar Lights; or aurorae, sing.: aurora) are natural colored light displays, which are usually observed in the night sky, particularly in the polar zone. The aurorae typically occur in the Ionosphere. Some scientists call them “polar auroras” (or … Continue reading

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Magnetic Field of Earth

The Earth has a substantial magnetic field, a fact of some historical importance because of the role of the magnetic compass in exploration of the planet. Structure of the Field The field lines defining the structure of the magnetic field … Continue reading

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