What approximate magnification did Galileo's newly improved telescope achieve, which was critical for his scientific observation?
Answer
About 20x magnification
The success of Galileo's discovery was intrinsically linked to his technological proficiency in enhancing existing optical instruments. He did not simply use an off-the-shelf device; he significantly improved it to achieve about 20x magnification. This level of enhancement was the crucial differentiator, allowing him to move beyond vague glimpses and conduct systematic observation necessary to track orbital motions. This technological leap, turning a terrestrial spyglass into a precise astronomical tool, is highlighted as separating his verifiable work from ambiguous past sightings, thus establishing the evidence-based view of science.
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