HIS 322D EXAM 2 - William Gilbert William Gilbert & the...

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William Gilbert Bacon and Gilbert were acquainted, but did not always see eye-to-eye 1269 - Peter the Wanderer writes "the letter of the Magnet," wherein he does experiments on a magnet's function, was first writings about magnets William Gilbert became the royal physician to Elizabeth I was not a sailor or navigator (most of who did stuff w/ magnets), but rather a physician Around Gilbert's time it became normal to present intellectual works as "new" instead of trying to hearken to ancient thinking De Magnete was sold as a "new physics" Also wrote briefly on electrical phenomena (static electricity, etc.) It was more important to Gilbert to understand patterns of behavior in nature rather than understanding the cause of those patterns (in common with Paracelsus) Magnetic philosophy was very preeminent in 1st half of 17th century; was eventually replaced by mechanical philosophy Tycho Brahe Tycho Brahe and observational astronomy Greatest pre-telescopic astronomer Copernicus new observations were based on former observations and molding his own from what they’d seen, Brahe focused on his own observational astronomy Tycho Brahe Never accepted Copernicus’s theory that the Earth moved Did believe two sphere Aristotelian theory
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Conservative guy Led very colorful life He was Danish, but was from Southern Sweden (At the time was Denmark) He was from a very high ranking noble family Personal Life Brother had been promised by Tycho’s father one of his sons (one of twins which was Tycho) Tycho was later kidnapped and raised by uncle Very socially prominent, and very wealthy Life events leading to interest in Astronomy Tycho was intended to receive education of Danish noble, traveling and meeting people, but not studying anything to demanding When he was 14 he had several experiences that impacted his life Impressed that astronomers could predict eclipse of sun so he wanted to learn how they did so he borrowed Ptolemy’s Almagest Quality of observations that were used were not perfect Uncle wasn’t pleased with his interest in Astronomy Acquired his own instruments including a : Cross Stab, angle measurer Astronomy wasn’t only interest… Interested in Parcelcian theory; Cosmic Connection between things on Earth and in Heaven Studied books like Ptolemy’s, but also looked at the sky itself through observation Did this more systematically, emphasized precise and detailed observations Most astronomers up to this point had only focused on big things in astronomy Tycho insisted on tracking every movement, every night Mapping stars
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Used slightly improved instruments All Naked eye observations Instruments were large, but also portable, because he traveled so much In 1572, while living in Denmark, he saw a new star; Was able to change position while elsewhere in Europe Bright for a short time, but not visible for months Star showed no measurable Paralax, something new had happened in the heavens which was very unarostitilean
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This note was uploaded on 12/03/2011 for the course HISTORY 322D taught by Professor Hunt during the Fall '11 term at University of Texas at Austin.

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HIS 322D EXAM 2 - William Gilbert William Gilbert & the...

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