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Questions tagged [galileo]

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Doubt regarding “Two New Science” by Galileo Galilei

I was reading "Two New Sciences" by Galileo Galilei and therein was a chapter named third day which deals with motion. When I started reading that chapter I eventually came across the theorem 1 ...
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1answer
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How did people believe Aristotle's law of gravity for so long?

So he says that heavier objects fall faster than light ones and size is irrelevant? (at least as far as I understand) This brings 2 easy ways to see the error of this. 1) throw a big rock and a ...
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1answer
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Could someone have discovered the moons of Jupiter before Galileo?

As Hans Lipperperhey had made a decent telescope albeit worse telescope before Galileo, source, would he have been able to theoretically view the moons of Jupiter before Galileo if he had looked?
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What was the aperture of the first Galileo's telescope?

Galileo used a refractor i.e. no mirror: but what was the aperture?
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Did Galileo really see Galilean Moons?

I want the answer to incorporate apparent magnitudes of those moons, power of his telescope, light pollution of that time, successful recreation of the scenario of watching Galilean moons using that ...
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2answers
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Is Spivak right in what he says about Galileo?

On chapter 9 of M. Spivak's book on calculus there is an exercise in which Spivak asks the reader to prove that Galileo "got his facts wrong". More specifically, Spivak asks one to to show if a body ...
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6answers
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How did heliocentrism survive after Galileo's sentencing?

Did the church continue to prosecute scientists for heliocentrism? If not, why not? What changed? Why didn't the church go after Isaac Newton?
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1answer
510 views

Where did Galileo say “All truths are easy to understand once they are discovered. The point is to discover them.”?

I've heard it claimed Galileo said or wrote: All truths are easy to understand once they are discovered. The point is to discover them. Where did he say this?
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1answer
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What are the origins of Galileo's paradox?

Galileo's paradox is the observation that the natural numbers can be put into one to one correspondence with the square numbers, showing that an infinite set can be bijected to a proper subset of ...