Celestial mechanics planetary positions, using geometrical or arithmetical techniques, and contemporary discussions of the physical causes of the planets' motion. Johannes Kepler (1571–1630) was the first to closely integrate the predictive geometrical astronomy, which had been dominant from Ptolemy in the 2nd century to Copernicus, with physical concepts to produce a "New Astronomy, Based upon Causes, or Celestial Physics" in 1609. His work led to the modern laws of planetary orbits, which he developed using his physical principles and the planetary observations made by Tycho Brahe. Kepler's model greatly improved the accuracy of predictions of planetary motion, years before Isaac Newton developed
Observations (Pierre Belon) rerum ... observationes". The Latin text was reprinted as an appendix to Clusius's "Exoticorum libri decem" (1605). Observations (Pierre Belon) Les observations de plusieurs singularitez et choses memorables trouvées en Grèce, Asie, Judée, Egypte, Arabie et autres pays estranges is a work of ethnographical, botanical and zoological exploration by Pierre Belon (1517–1564), a French naturalist from Le Mans. Starting in 1546, Belon travelled through Greece, Asia Minor, Egypt, Arabia and Palestine, returning to France in 1549. His "Observations", with illustrations, were first published in 1553. A second edition appeared in 1555. The work was translated into Latin by Charles de