Johannes Stadius

Johannes Stadius or Estadius (Dutch: ''Jan Van Ostaeyen''; French: ''Jean Stade'') (ca. 1 May 1527 – 17 June 1579), was a Flemish astronomer, astrologer, and mathematician. He was one of the important late 16th-century makers of ephemerides, which gave the positions of astronomical objects in the sky at a given time or times. Provided by Wikipedia