* The "sky" is just the appearance of space. The Earth's atmosphere doesn't have a defined top, it gradually thins out.

* Earth's orbit isn't perfectly circular. It's slightly elliptical, so we are slightly closer to the sun at perihelion (around January 3rd) and slightly farther at aphelion (around July 4th).

* The "height" of the sky isn't related to our distance from the sun. The apparent height of the sky depends on our perspective on Earth and atmospheric conditions.

What might be confusing you?

You might be thinking about:

* Summer Solstice (around June 21st): This is the day with the longest hours of daylight in the Northern Hemisphere. The Sun appears highest in the sky at noon on this day.

* Winter Solstice (around December 21st): This is the day with the shortest hours of daylight in the Northern Hemisphere. The Sun appears lowest in the sky at noon on this day.

These solstices affect the *angle* of the sun in the sky, not the height of the "sky" itself.