You already asked that question and I lready answered. You could have find this answer by yourself, or you could have sincerelly asked, but no, you clearly thought you are way clever than the thousands of astronomists and astrophysicists in the world, who can be beaten by JUST ONE QUESTION !!. Seriously, if you tone down, humble yourself a bit, and stop acting proud of being ignorant, we may be able to answer some of your questions. Im not kidding, we are all here to learn, and there's nothing wrong with not knowing something if you ask sincerelly.