Ideas of Galileo Galilei, by Theme

[Italian, 1564 - 1642, Ffirst true scientist, based in Pisa and Florence. Proved the heliocentric solar system. Tried for heresy; house arrest from 1633.]

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12. Knowledge Sources / B. Perception / 2. Qualities in Perception / d. Secondary qualities
Heat and colour don't exist, so cannot mislead about the external world
Tastes, odours and colours only reside in consciousness, and would disappear with creatures
14. Science / D. Explanation / 2. Types of Explanation / h. Explanations by mechanism
Galileo introduced geometrico-mechanical explanation, based on Archimedes
26. Natural Theory / A. Heart of Nature / 4. Pythagoreanism
To understand the universe mathematics is essential
27. Natural Reality / A. Physics / 2. Movement
Galileo mathematised movement, and revealed its invariable component - acceleration