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Galileo's Telescope
- Galileo heard that a Dutchman was selling telescopes to Venice.
- He quickly built his own and presented it to the Doge, securing a raise.
Galileo's astronomical observations
- Galileo didn't invent the telescope, but he popularized it.
- He wasn't the first to point it at the sky, but his observations were groundbreaking.
Copernicus and the Church
- Copernicus' book, proposing a heliocentric model, wasn't initially banned by the Catholic Church.
- It was tolerated for decades, partly due to its dedication to the Pope and a preface framing it as hypothetical.