You are probably being downvoted because the big bang, our ability to estimate the age of the universe, etc is believed to be a fact by many including astronome

You are probably being downvoted because the big bang, our ability to estimate the age of the universe, etc is believed to be a fact by many including astronomers and astrophysicists. And yet there are so many unanswered questions that it is reasonable to question those things. In this case, it calls into question our age estimation for both planets and the universe.