1. Earth's Tilt:
* The Earth is tilted on its axis at approximately 23.5 degrees. This tilt causes different parts of the Earth to receive varying amounts of sunlight throughout the year.
* During the summer solstice in the Northern Hemisphere (around June 21st), the North Pole is tilted towards the Sun, resulting in longer days and the Sun appearing higher in the sky.
* During the winter solstice (around December 21st), the North Pole is tilted away from the Sun, resulting in shorter days and the Sun appearing lower in the sky.
* The opposite occurs in the Southern Hemisphere.
2. Earth's Orbit:
* The Earth orbits the Sun in an elliptical path. This means the distance between the Earth and the Sun varies throughout the year.
* The Earth is closest to the Sun in January (perihelion) and farthest from the Sun in July (aphelion).
* While the variation in distance does affect the amount of solar radiation received, it's not the primary reason for the changing sunrise and sunset positions.
How it Affects Sunrise and Sunset:
* Sunrise and Sunset Points: Due to the Earth's tilt and its orbit, the points where the Sun rises and sets on the horizon vary throughout the year. For example, in the Northern Hemisphere, the sunrise and sunset points are farther north in the summer and farther south in the winter.
* Duration of Daylight: The length of the day (time between sunrise and sunset) also changes. The days are longer in the summer and shorter in the winter.
In summary, the changing position of the Sun in the sky throughout the year, as seen from Earth, is primarily due to the Earth's tilt on its axis. This results in variations in the sunrise and sunset positions and the duration of daylight.
