This is a thread about Newtonian Mechanics. The topic is the "Gravitational forces between the Earth and the Sun". Kepler's laws are addressed in high school. So, are Newton's laws and Gravitation which are relevant to this topic. The two body problem (which we discussed and is relevant) is covered in the first year of undergraduate physics.
That is the topic that I addressed. I am assuming from the OP that this is a high school student, the first question deals with Newton's third law which is covered in high school and is pretty important to understand.
I am really truly and fantastically impressed that you know the tilt of the earth... and I am sincerely grateful for you bestowing that random fact upon us. But, this random factoid, however impressive it is, has no relevance to the topic of the thread.