Galileo Galilei is formally banned by the Roman Catholic Church from teaching or defending the view that the earth orbits the sun.

Galileo Galilei, the pioneering Italian astronomer and physicist, faced condemnation by the Roman Catholic Church in the 17th century for advocating heliocentrism—the idea that the Earth orbits the Sun. His support for Copernican theory directly contradicted the geocentric model endorsed by the Church, which positioned Earth as the universe’s center. In 1616, the Church formally declared heliocentrism “false and contrary to Scripture” and warned Galileo against promoting it. However, in 1632, he published Dialogue Concerning the Two Chief World Systems, which defended heliocentrism, leading to his trial by the Roman Inquisition in 1633. Found guilty of heresy, Galileo was forced to recant his views and spent the rest of his life under house arrest. His condemnation symbolized the broader conflict between science and religious doctrine, though the Church later acknowledged its error, officially clearing Galileo’s name in 1992.