Cornelius Gemma
Cornelius Gemma was born on February 28, 1535. See ranking, bio blurb, and everyone else born that day.
About Cornelius Gemma
Cornelius (or Cornelio) Gemma (28 February 1535 – 12 October 1578) was a Flemish physician, astronomer and astrologer, and the oldest son of cartographer and instrument-maker Gemma Frisius. He was a professor of medicine at the Catholic University of Leuven, and shared in his father's efforts to restore ancient Ptolemaic practice to astrology, drawing on the Tetrabiblos. As an astronomer, Gemma is significant for his observations of a lunar eclipse in 1569 and of the 1572 supernova appearing in Cassiopeia, which he recorded on 9 November, two days before Tycho Brahe, calling it a "New Venus."…