* Earth's Tilt: Earth's axis is tilted at approximately 23.5 degrees relative to its orbital plane (the plane in which it orbits the sun). This tilt means that different parts of the Earth receive varying amounts of direct sunlight throughout the year.
* Summer Solstice: During the summer solstice in the Northern Hemisphere (around June 21st), the North Pole is tilted towards the sun. This means the Northern Hemisphere receives more direct sunlight for a longer period, resulting in longer days and warmer temperatures – summer.
* Winter Solstice: Six months later, during the winter solstice (around December 21st), the Northern Hemisphere is tilted away from the sun. This results in shorter days, less direct sunlight, and colder temperatures – winter.
Elliptical Orbit's Influence:
While Earth's orbit is elliptical, it's not a significant factor in determining the seasons. The slight difference in distance from the sun due to the elliptical shape only causes a minor variation in the amount of solar energy received. The primary reason for our seasons is the tilt of Earth's axis.
In summary: The tilt of Earth's axis, not the elliptical shape of its orbit, is responsible for the annual cycle of seasons. The tilt causes different hemispheres to receive varying amounts of direct sunlight throughout the year, leading to summer and winter.
