I see. Thank you for the very quick replies. o.o
Even counting the sun's attraction force, it is possible for the Earth to be tidally locked?
And, can you explain why it would "move further away" and not "closer"?
First of all, I did not major in Physics, but I did pass GCE with A. (This is to make a point, not to boast.)
But there's a matter that doesn't make any sense to me, and none of my acquaintances could give me the clarification so I came to this forum, hoping someone can make me understand this...