Earth's Rotation around its Axis

Earth rotates around its own axis through360° once every 24 hours. This is the cause of day and night. If we divide 360° by 24, we get 15°. In other words, it takes the Earth 1 hour to turn through 15°.

The Earth's polar axis tilts at an angle of 23,5° with its orbital plane around the sun. As put by A.P. Herbert: "The Earth goes round the sun with its head on one side" (Herbert, page 39). This inclination is responsible for the climate changes and the seasons experienced on Earth.