The Earth's tilt on its axis is what causes the change in the seasons and explains why summer days are longer than winter days. The Earth orbits in an ellipse around the Sun, and because of this, it draws closer to the Sun at some points than at others. It is the direction of the Earth's tilt in its axis that determines the length of days and nights.
An ellipse is an oval shape rather than a circle. In the summertime in the northern hemisphere, the Earth is farther from the Sun because of the ellipse in its orbit, but the angle of the Earth's tilt points the hemisphere towards the Sun, making the days longer. The Sun's angle is also higher during the summer months than the winter months. In the winter, the Earth's orbit draws it closer to the Sun, but the Earth's axis tilts away from the sun, making the days shorter in the northern hemisphere. The summer solstice marks the first day of the summer and the longest day of the year. This is because the North Pole is pointed the closest to the Sun than any other day of the winter. The reverse is true during the winter solstice when the North Pole is tilted the farthest from the Sun.Learn More
The scientific adjectives of the four calendar-based seasons are vernal for spring, estival for summer, autumnal for autumn and hibernal for winter. There are also two distinct adjectives for temperate climate regions, and these are prevernal for pre-spring and serotinal for late summer.Full Answer >
The four seasons are winter, followed by spring, which is followed by summer and then autumn. After autumn comes another winter, and the cycle repeats although it can begin with any season, not just winter.Full Answer >
The seasons reflect the Earth's tilt toward and away from the sun. These tilts are called solstices and equinoxes. They occur four times a year and, although their dates don't match exactly, they roughly correspond to the seasons.Full Answer >
June 21st is the longest day of the year in the Northern Hemisphere because it is the summer solstice, which describes the tilt of the Earth's axis. This phenomenon is only observable outside of the tropics as it is the tilt of the Earth that alters the duration of light exposure of any one point on the surface.Full Answer >