In which work published in 1610 did Galileo show the Moon was uneven?
Answer
Sidereus Nuncius
Galileo documented and published his groundbreaking observations of the lunar surface, detailing its unevenness, in his highly influential work titled Sidereus Nuncius, which translates to The Starry Messenger. This publication occurred in the year 1610, shortly after his initial 1609 observations. Within this text, he clearly illustrated through sketches and prose that the Moon was 'not perfectly round and smooth, but like the earth, uneven and full of cavities and protuberances.' This direct empirical evidence, disseminated widely in this book, was the primary vehicle that challenged the ancient philosophical consensus regarding celestial perfection.
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