linkedin post 2021-02-26 05:52:04

linkedin post 2021-02-26 05:52:04

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SUPER DENSE STARS. “In neutron stars, the degeneracy pressure produced by the neutrons counterbalances the gravitational pull to keep the star in a hydrostatic equilibrium state. The structure of neutron stars with less dense core provides an opportunity to transform into quark stars. The densest compact objects composed of up, down and strange quark matter are named as quark stars.” https://www.sciencedirect.com/science/article/pii/S0577907319309773 View in LinkedIn
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linkedin post 2021-02-26 05:51:04

linkedin post 2021-02-26 05:51:04

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GRAVITATIONAL COLLAPSE. “This collapse is responsible for the existence of massive stars referred to as compact objects which are classified as white dwarfs, neutron stars and black holes based on the masses of parent stars.” https://www.sciencedirect.com/science/article/pii/S0577907319309773 View in LinkedIn
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linkedin post 2021-02-26 05:45:50

linkedin post 2021-02-26 05:45:50

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THIS PAPER is a really beautiful example of how advanced mathematical calculations about strange star properties can marry up with observed measurable parameters, and gives a glimpse into where modern astronomy and physics are essentially the same. “Mathematics is the alphabet with which God has written the universe”, to quote Galileo Galilei. https://www.sciencedirect.com/science/article/pii/S0577907319309773 View in LinkedIn
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linkedin post 2021-02-27 05:22:20

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TOXIC SUBSTANCES. Reading Theophilus reminds one why life was, as Thomas Hobbes described, “nasty, brutish and short”. These artisans splashed around lead, mercury (quicksilver) and sulfur with abandon, heating them at length in open vessels. Indeed they were the ingredients for paints, and one or two still are. https://lnkd.in/d7yzXt5 View in LinkedIn
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linkedin post 2021-02-27 05:20:17

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ANCIENT CRAFTSMEN were highly skilled and had to source almost everything by their own hand, tools, reagents, even the workshops. Theophilus did not merely compile recipes, but had a first hand working knowledge of each of the crafts he described. It is readily apparent on reading this work that ancient craftsmen were immensely skilled and knowledgeable, by necessity. There was no handy hardware store, Amazon, or knowledge but a click away. https://lnkd.in/d7yzXt5 View in LinkedIn
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linkedin post 2021-02-27 05:18:26

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CRAFTS COVERED. Theophilus’s work covers the enormous range of craftsmanship of his time, ranging from the making of paints, glues, oils, varnishes, and metal work, often citing several methods. Glasswork required building four types of kiln and making numerous colored glasses and glass paints, as well as lead window assembling. The metal work includes building the workshop, making the kiln, all the tools, a church organ, methods of refining and plating metals, and church bells. And more. https://lnkd.in/d7yzXt5 View in LinkedIn
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linkedin post 2021-02-27 05:13:03

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“THEOPHILUS Presbyter (fl. c. 1070–1125) is the pseudonymous author or compiler of a Latin text containing detailed descriptions of various medieval arts, a text commonly known as the Schedula diversarum artium ("List of various arts") or De diversis artibus ("On various arts"). 'Theophilus' was quite possibly a Benedictine monk. It has been suggested (particularly by Eckhard Freise) that Theophilus is the same person as the artisan monk Roger of Helmarshausen. Roger appears to have come from Stavelot Abbey in the Meuse River region, was active as an artist and author between 1100 and 1107 in St. Pantaleon's church in Cologne, and moved to Helmarshausen Abbey in 1107.” https://lnkd.in/dKA6i-T View in LinkedIn
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linkedin post 2021-02-27 05:09:19

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THEOPHILUS, The Various Arts, De Diversis Artibus (medieval text, written between 1110 and 1140 AD) translated from the Latin with Introduction by C.R. Dodwell, then Fellow and Librarian, Trinity College, Cambridge, Thomas Nelson and Sons Ltd (1961). This remarkable text illustrates in detail how mediaeval craftsmen worked. I quote both the excellent Introduction and the text. https://lnkd.in/dmDMw8U View in LinkedIn
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