What is the term used to indicate the point where the Sun is at the nothernmost position?

The term used to indicate the point where the Sun is at the northernmost position is called the "Summer Solstice". This event occurs around June 21st each year in the Northern Hemisphere. Here are the steps to understand this:

1. The Earth's axis is tilted relative to its orbit around the sun. This tilt is what causes our seasons.

2. When the North Pole is tilted towards the Sun, it's summer in the Northern Hemisphere. This is because the Sun's rays are hitting that part of the Earth more directly, causing warmer temperatures.

3. The point at which the North Pole is tilted most directly towards the Sun is called the Summer Solstice. This is when the Sun appears at its highest point in the sky, and we have the longest day of the year.

4. After the Summer Solstice, the North Pole starts to tilt away from the Sun, leading to shorter days and cooler temperatures, until we reach the Winter Solstice, when the North Pole is tilted furthest away from the Sun.

5. The cycle then repeats. The term "solstice" comes from the Latin words for "sun" and "to stand still", because the Sun appears to stand still in the sky at the solstices before reversing direction.