Because of his heliocentric beliefs.
Galileo was allowed to publish his findings as theory, which was a major relaxation of Catholic doctrine. Instead, he published them as fact.
Because the Catholic doctrine was that Rome was the centre of the universe and all things revolved round it. When Galileo saw the moons of Jupiter orbiting jupiter, this proved that Catholic teaching and beliefs were wrong and if this was wrong, what else about Catholic teaching may be wrong!
Catholic.
Some Catholic ethologists saw them as heresy because they supported the Copernicus' discovery that the earth rotated around the sun. Catholic theology had endorsed the view of Ptolemy (an ancient Greek astronomer) that the sun rotated around the earth. The new discoveries clashed with the Catholic doctrine of the time. Galileo was lucky because the pope was not bother about these issue. This meant that his inquisition led to his house arrest.
Galileo was locked up by the Catholic Church in 1633 for his support of the heliocentric model of the universe, which contradicted the Church's geocentric beliefs. He was charged with heresy for advocating the idea that the Earth revolves around the Sun, which was deemed to be against Church doctrine.
Heresy, for one: The Catholic Church threatened to have him ex-communicated for going against the doctrine of the Earth being the center of the Universe. Now THAT'S bold!
In galileo`s time the catholic church was at authority
Galileo's view that the Earth revolves around the Sun contradicted the established geocentric model supported by the Catholic Church at the time. The Church believed Galileo's heliocentric theory challenged the teachings of the Bible and was considered heretical. Galileo was pressured by the Church to renounce his views to avoid punishment, which led to his house arrest for the remainder of his life.
Galileo raised ecclesiastic hackles because he challenged the church-sanctioned, astronomical doctrine of his day: that the the earth stood at the center of both the solar system and the known universe.
The Crime of Galileo posited that the Sun was the center of the universe instead of the Earth. The was directly opposed to the teaching of the Catholic Church, who deemed Galileo a heretic.
Galileo was the first
he was a catholic <--- thats religious not political