Viv, i will return to the sun, however at first please answer my question: what value is the gr avitational field of the earth is zero in the center?
The effective measurable net value of the force of the gravitaional field at the exact center is zero, of course. Why would you even ask such a basic question?
I claim zero, so does the authors of a textbook. What is it?
NOW you claim that. Your original claim is that there was no gravity in the center. As least now you admit there is a gravitionaly field. As predicted, now you are claiming the same thing as me but trying to pretend that's what you've been saying all along.
Such blatant dishonesty and inability to simply admit you were incorrect are really rather poor qualities in a person.