My new research focuses on mathematics and the sciences of the stars in 14th-century Constantinople, especially the network of polymaths around Nikephorus Gregoras.
Today’s image comes once again from the many diagrams in BL Royal MS 16 C XII. This particular drawing illustrates how the earth’s shadow is cast by the sun. I appreciate the detail the scribe added to the sun, giving it a face complete with attitude. Read more
One of my students happens to be a skilled baker. She made a special History of Science pumpkin pie for Thanksgiving. Seriously? When was the last time you saw a pumpkin pie with an image of Tycho Brahe on it? My students are great. Read more
The standard geocentric model assumed that the planets were arranged out from the center, the earth, according to the period of revolution. On this assumption, the shorter the period, the closer the planet was to the stationary, central Earth. Claudius Ptolemy ensconced the order in his Syntaxis (commonly know as… Read more