Was it I’m a math equation? Was it a wild guess?
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They didn’t. When Galileo used the telescope to look at Jupiter it was a revelation. Specifically, he saw the ‘Galilean moons’ which look nothing like you expecting them to when you observe them for yourself. I can’t imagine what he thought but I am sure he said the Italian equivalent of “What the sh_t?”
[http://astronomyonline.org/solarsystem/galileanmoons.asp](http://astronomyonline.org/solarsystem/galileanmoons.asp)
Planets, which are Greek for ‘Wanderer’ defied expectations, observers didn’t know the difference between a star and a planet except that the planets obviously moved throughout the night.
Until powerful telescopes and astronomers like Hubble we knew practically nothing about the celestial environment. People had to be convinced about the scale of outer space, Anaxagoras spun in his grave. As an aside, Anaxagoras was a pre-Socratic philosopher known for saying that stars were huge balls of flaming rock that were small to us because they were really far away and that the Gods had nothing to do with them. He was laughed into obscurity.
That wasn’t that long ago, Hubble made convincing arguments in the 1920s, barely a century ago. Shoot, we didn’t know about dinosaurs until 1842. The US constitution pre-dates the discovery of Dinosaurs. The depth of ignorance about the natural world pre mid 19th century is stunning to a scientifically minded person of 2023. Someone with AP bio, AP chem, and AP Physics are given information that was beyond cutting edge a century ago.
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