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Nicolaus Copernicus (Polish: Mikołaj Kopernik) was a Polish and German scientist, astronomer, mathematician, mechanic, economist, and Renaissance canonist. He was the author of the heliocentric system of the world, which initiated the first scientific revolution.
Copernicus studied the humanities, including astronomy and astrology, at the University of Krakow and at the University of Bologna in Italy. Together with other astronomers, including Domenico Maria de Novara (1454-1504), he was engaged in observing the stars and planets, recording their movements and eclipses. At the time, medicine was closely related to astrology, as the stars were believed to influence the human body, and Copernicus also studied medicine at the University of Padua between 1501 and 1503.
Nicolaus Copernicus, based on his knowledge and observations, was the first to suggest that the Earth is a planet that not only revolves around the sun every year, but also rotates once a day on its axis. This was in the early 16th century when people believed the Earth to be the center of the universe. The scientist also suggested that the Earth's rotation explained the rising and setting of the Sun, the movement of the stars, and that the cycle of the seasons was caused by the Earth's rotation around itself. Finally, he correctly concluded that the Earth's motion in space causes the planets to move backwards across the night sky, the so-called retrograde direction.
Although Copernicus' model was not completely correct, it laid a solid foundation for future scientists, such as Galileo, who developed and improved mankind's understanding of the motion of celestial bodies. Copernicus completed the first manuscript of his book De Revolutionibus Orbium Coelestium (On the Rotation of the Celestial Spheres) in 1532. In it, the astronomer outlined his model of the solar system and the paths of the planets. However, he published the book only in 1543, just two months before his death, and dedicated it to Pope Paul III. Perhaps for this reason, and also because the subject matter was too difficult to understand, but the church did not finally ban the book until 1616.
Abraham Ortelius (Ortels) was a Brabantian cartographer, geographer, and cosmographer. He is recognized as the creator of the first modern atlas, the Theatrum Orbis Terrarum (Theatre of the World). Along with Gemma Frisius and Gerardus Mercator, Ortelius is generally considered one of the founders of the Netherlandish school of cartography and geography. He was a notable figure of this school in its golden age (approximately 1570s–1670s) and an important geographer of Spain during the age of discovery. The publication of his atlas in 1570 is often considered as the official beginning of the Golden Age of Netherlandish cartography. He was the first person proposing that the continents were joined before drifting to their present positions. Beginning as a map-engraver, in 1547 he entered the Antwerp Guild of Saint Luke as an illuminator of maps. In 1560 when travelling with Mercator to Trier, Lorraine, and Poitiers, he seems to have been attracted, largely by Mercator's influence, towards the career of a scientific geographer. In 1564 he published his first map, Typus Orbis Terrarum, an eight-leaved wall map of the world. On 20 May 1570, Gilles Coppens de Diest at Antwerp issued Ortelius's Theatrum Orbis Terrarum, the "first modern atlas" (of 53 maps).
