What was wrong, in the eyes of the Church, with the theories of Copernicus and Galileo?

Why were the works of both men placed on the Index of Forbidden books? My AP Euro teacher says it’s because the Church is “hostile to science” which I know is untrrue, and that Galileo was tried because his theories “undermined the teaching that everything revolves around the Pope” which is equally nonsensical. I know by now that public school history gives a glaringly inaccurate picture of the Church’s role in modern Western Civilization, but it begs the question, why?

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Recommended Reading:

Galileo and the Catholic Church

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