Why is earth closest to the sun in January?
Because of elliptical orbit.
Johannes Kepler was the one who understood the actual orbits of the planets around the Sun. He suggested tha the orbit of each planet around the sun is an ellipse with the Sun being at one of the focii. So, at one time of the year the Earth should be closer to the Sun than the other. When the planet is closer to the Sun it is called Perihelion and when it is away from the planet it is called Aphelion.
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Earth is closest to the sun in January because of its elliptical orbit around the sun. This point of closest approach, called perihelion, occurs around January 3rd each year.
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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
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