Is heliocentrism a heresy, and can holding it damn a person?

Let me put it this way. If a person knows for a fact, from all the facts available, that heliocentrism was rightly called a formal heresy by the Church, and he denies it because he is ashamed of the doctrine and does not want to be ridiculed, then yes, it is a sin for him. It is not a sin for others, because for it to be a mortal sin and a heresy the Church has to enforce it, and right now the Church is not enforcing it. We may have the facts on our side, but part of the educational process is enforcement, punishing those who do not obey the doctrine; if that is not being done, there are no teeth to it and the public is not held responsible. My purpose for the last twenty-some years has been to educate the Church back to where it should be, because if a thing is a formal heresy in one part of history, it is a formal heresy in every part; what changes is only the people circulating through the Vatican, some weak, some strong. Even Cardinal Ratzinger gave two speeches touching on this, in Parma, Italy in 1990 as prefect for the doctrine of the faith, and at La Sapienza in 2008 as pope, after he discovered that Einstein's general relativity supports geocentrism, and both times he was told to leave and not come back. Relativity actually requires you to produce a geocentric model with equations that work, and that has been done many times over. So you have to treat the heliocentric doctrine gingerly, depending on who is absorbing it.