The sphere of the Earth is always half illuminated by the Sun, so day and night are born, because the Earth rotates on its axis, in turn, every part of the Earth's surface is illuminated by the sun.
Day and night are due to the Earth rotating on its axis
The sphere of the Earth is always half illuminated by the Sun, so day and night are born, because the Earth rotates on its axis, in turn, every part of the Earth's surface is illuminated by the sun.
Because the Earth is spherical and rotates on its own axis from west to east, the Sun can only support half of the Earth. The half that is illuminated by the sun is day, the half that is not illuminated by the sun is night
