What is day and night?

Separation between night and day

The video shows the line between night and day, following the tilt of the Earth.

However, the line that separates the bright areas of day and the shadowed areas of night on Earth, changes position during the year.

Sometimes it will go from north to south, but sometimes it can be tilted and follow the angle of the Earth's axis.

There's more to learn...

This guide
Seymour and Rosie looking at planet earth.

What is day and night?