That means the tilt is not a factor because the planet spends equal time tilted in either direction over the course of a year. If the tilt is 90 during spring and autumn, 66.6 during the winter and 113.4 during the summer, than the annual average of the tilt will be 90 degrees. Do you understand the concept of taking an average value over the course of a year now?
The tilt is constant, it doesn't change. So it always points to the north star but in December the day side is in the south while in June the day side is in the north. I am afraid I don't understand your inquiry.
The image is wrong, because the heat map is, as OP said, an annual average. Therefore, they do not represent seasonal temperature.
That means the tilt is not a factor because the planet spends equal time tilted in either direction over the course of a year. If the tilt is 90 during spring and autumn, 66.6 during the winter and 113.4 during the summer, than the annual average of the tilt will be 90 degrees. Do you understand the concept of taking an average value over the course of a year now?
as 2442 already mentioned Axial Tilt
The tilt is constant, it doesn't change. So it always points to the north star but in December the day side is in the south while in June the day side is in the north. I am afraid I don't understand your inquiry.