Suprising it is school series 7

 Yes, Seasons is the natural next one. It is another school lesson we all learnt, but the reason behind it is surprisingly easy to get wrong.

Why Do We Have Seasons?

We often imagine that summer comes when the Earth moves closer to the Sun and winter when it moves farther away.

That is not the reason.

The main reason for seasons is the tilt of Earth's axis. Earth is tilted by about 23.5° as it travels around the Sun.

Because of this tilt, different parts of Earth receive sunlight at different angles during different times of the year.

When the Northern Hemisphere is tilted towards the Sun, sunlight falls more directly and the days are longer. We experience summer.

At the same time, the Southern Hemisphere is tilted away from the Sun, giving it winter.

Six months later, the situation reverses.

The important point is that summer is not simply about being closer to the Sun. In fact, Earth is actually slightly closer to the Sun during the Northern Hemisphere's winter.

So the seasons are created by a beautiful combination of:

Earth's tilt + Earth's journey around the Sun + changing sunlight and day length.

And perhaps that is the lesson we forgot:

The Earth does not need to move dramatically closer to the Sun to change our seasons. A small tilt, repeated year after year, is enough to transform the world around us.