Rudolphine Tables and instructive examples for computing planetary positions. For most stars these tables were accurate to within one arc minute, and included corrective factors for atmospheric refraction. The tables were sufficiently accurate to predict a transit of Mercury observed by Pierre Gassendi in 1631 and a transit of Venus observed by Jeremiah Horrox in 1639. Rudolphine Tables The Rudolphine Tables () consist of a star catalogue and planetary tables published by Johannes Kepler in 1627, using some observational data collected by Tycho Brahe (1546–1601). The tables are named as "Rudolphine" in memory of Rudolf II, Holy Roman Emperor. Star tables had
Observations (Pierre Belon) 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 l'Écluse (Carolus Clusius) and published in 1589 under the title "Petri Bellonii Cenomani plurimorum singularium et memorabilium