Why did the findings of Galileo frighten Catholic and Protestant leaders? His findings supported the theories of Aristotle His findings led him to rebel against the Cardinals His findings did not support the Copernican theory His findings went against Church teaching and authority.

The findings of Galileo frightened the Catholic and Protestant leaders, because his findings went against Church teaching and authority. This was because they saw his astronomical work as being heretic, forced him to recant and spent the rest of his life under house arrest. Galileo Galilei was an Italian astronomer, physicist, engineer, philosopher and mathematician whose work greatly influenced the scientific revolution during the Renaissance.