Even rarer than blue, the color green is the most significant. Naturally, you re trembling with excitement, anxious to learn all you can about this very special planet. It rotates once every 23.9345 hours approximately 24 hours in humans time. Each 24-hour period of rotation is called a day and is divided between the day proper, when the Sun illuminates a given area, and night, when it s dark. During this orbit, tilting of Earth s axis influences surface temperature and weather.
Humans divide their year into four seasons accordingly.
The season boasting the most sunlight and warmest temperatures is Summer. Summer and Winter are separated by more moderate seasons called Spring and Fall. There s essentially just one continuous summer along the Equator, an imaginary line circling the Earth around the middle. At the two ends farthest from the Equator called poles the temperature is very cold during the summer and even colder during winter, when there s little daylight. The planet can be thought of as a series of spheres.