What are Aphelion and Perihelion?

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The Earth is at its furthest point in its orbit around the Sun on July 4. At this point, the Earth will be approximately 9.45 million miles or 15.21 million kilometers from the Sun. The distance at this location will be 1.67% greater than the average distance between the Sun and the Earth. (The average distance between the Earth and the Sun is called an astronomical unit and is equal to 9.29 million miles or 14.96 million kilometers.)

On a hot summer day it may be hard to imagine the Earth being so far from the Sun, but seasonal temperature changes are not caused by our distance from the Sun, but by the tilt of the Earth on its axis in different directions. The tilted angle affects whether the sun's rays will hit the Earth at a low angle or if they will hit the Earth directly.

Earth will be at its closest orbit around the Sun on January 4, 2023, a mean distance of 9.14 million miles (14.71 million kilometers). The earth's orbit is not completely circular, due to which we have to face the conditions of aphelion and perihelion. The degree to which a planet deviates from its full circle is called eccentricity. Of all the planets in our solar system, the orbit of Venus is the closest to a spherical shape.



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