Because of the earth's tilt and orbit around the sun, the poles receive less energy and heat from the sun. This results in only two polar two seasons—summer and winter. In summer at the poles, the sun does not set, and in winter the sun does not rise.
Tilt The Earth is slightly tilted—that is what gives us our seasons.
how it works. On one side of its orbit around the sun, the Earth is
tilted towards the sun. During this time, the northern hemisphere receives
more heat so has higher temperatures—it is summer. Six months later, the Earth is on the
other side of its orbit, and the Earth is tilted away from the
sun. Now, the northern hemisphere receives less heat so it is colder—it