The radius of the sun's orbit around the Earth's axis symmetry varies throughout the year, being smallest when summer is in the northern annulus and largest when it is summer in the southern annulus.
Here are some very good diagrams of seasons on the flat Earth.
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There is a vast ice wall at then end of the Earth. The ice wall is roughly 150ft high. This also explains why you can find a vast plane of ice when you travel south.
Antarctica as a continent does not exist.
Furthermore, it is is unknown what is underneath the Earth. Some believe it to be just rocks, others believe the Earth rests on the back of four elephants and a turtle.