The Earth's Axis


The earth's axis is very unique.

Let’s first find out what an axis is. Normally, axis is either an imaginary or a physical line that prescribes an object’s movement. An example for a physical axis is a tight string that goes through the center of a spinning ball. An example for an imaginary axis can be the Earth’s axis. The Earth’s Axis is an imaginary line that has the center point for gravity. It goes through the north and the south poles and spins around them. It is part of the Earth that is not really moving like the Earth itself. Unlike most of the physical objects that have an axis, Earth does not spin straight up and down but it is actually tilted. It is tilted perpendicularly about 23.5 degrees, which is inclined 66.5 degrees from the Earth’s orbital plane.

We know that the amount of sunlight that Earth receives changes during the period of year, which gives us four seasons. This is because as the Earth rotates round the sun, the tilt of the axis does not change. Therefore, the Earth receives different amounts of sunlight as it revolves the sun. This is why the daytime for summer is longer than the winter. During summer, the axis points towards the sun but during winter, the axis points away from the sun and gives less sunlight than summer.





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