I will try to be as literal as I can. I was researching about the black hole, according to NASA and much other organisation a black hole form when a star collapses under its own gravity. "Stellar black holes form when the center of a very massive star collapses in upon itself". Gravity is directly proportional to mass, considering star as the sun in this situation. Why would it face such a gravity that is enough for to implode itself? Whereas Earth doesn't implode under its own gravity, given the current arrangement of the solar system . This raises another question, what if the earth is in a vacuum provided enough space , will it implode? Also does sun's implosion has anything to do with the gravity that it influences on other planets?