he believed in the truth of observation & reason
That they had a funny name!
His discoveries were not against Christian beliefs. Galileo was himself a Christian. The discoveries were, however, against the politics of the church at that time.
1616
Because of his heliocentric beliefs.
Galileo's opponent was the Catholic Church, particularly the Roman Inquisition, who condemned his support of the heliocentric model of the universe. Galileo was eventually tried and forced to recant his beliefs under threat of imprisonment.
recanted his beliefs
Galileo was not kicked out of his country because of his beliefs. He was put on trial by the Catholic Church for promoting the idea that the Earth revolves around the Sun, which was contrary to Church teachings at the time. He was ultimately found guilty of heresy and placed under house arrest for the rest of his life.
Galileo's discovery of the phases of Venus and the moons of Jupiter challenged existing scientific and religious beliefs. It contradicted the geocentric model of the universe, which positioned Earth at the center, and supported Copernican heliocentrism instead. This challenged religious beliefs that were based on a literal interpretation of the Bible, which placed Earth at the center of the universe. Consequently, Galileo's findings led to clashes with the Catholic Church and the Inquisition.
Galileo used more advanced technology to find stronger observational evidence than Copernicus was ever able to provide.
One of the biggest challenges Galileo faced was the opposition and persecution from the Catholic Church for his support of the heliocentric model of the solar system, which went against the Church's geocentric beliefs. This resulted in Galileo being tried by the Inquisition and placed under house arrest for the remainder of his life.
Galileo abjured his scientific findings and beliefs in 1633 because he was facing the threat of torture and death by the Roman Catholic Church for his defense of the heliocentric model proposed by Copernicus. By recanting his views, Galileo avoided further persecution and ensured his survival.
Science and scientists use the scientific method, which was first proposed by Galileo in 1638. Therefore there can have been on "ancient beliefs about science" before then.