Johannes Kepler

Georg von Peuerbach – Astronomy at the Beginning of the Scientific Revolution in Early Modern Age

Georg von Peuerbach – Astronomy at the Beginning of the Scientific Revolution in Early Modern Age

On May 30, 1423, Austrian astronomer, mathematician and instrument maker Georg von Peuerbach was born. He is best known for his streamlined presentation of Ptolemaic Astronomy in the Theoricae Novae Planetarum. Furthermore, he promoted the use of Arabic numerals (introduced 250 years earlier in place of Roman numerals), especially in a table of sines he calculated with unprecedented accuracy. Not much is known about Peuerbach’s Early Life There is not much known about…
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Giovanni Riccioli – a man of Encyclopedic Knowledge

Giovanni Riccioli – a man of Encyclopedic Knowledge

On April 17, 1598, Italian astronomer and a Catholic priest in the Jesuit order Giovanni Battista Riccioli was born. He is known, among other things, for his experiments with pendulums and with falling bodies, for his discussion of 126 arguments concerning the motion of the Earth, and for introducing the current scheme of lunar nomenclature. He also was the first to observe a double star (two stars so close together that they…
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Euclid of Alexandria – the Father of Geometry

Euclid of Alexandria – the Father of Geometry

At about 330 BC, Euclid of Alexandria was born, who often is referred to as the Father of Geometry. His Elements is one of the most influential works in the history of mathematics, serving as the main textbook for teaching mathematics (especially geometry) from the time of its publication until the late 19th or early 20th century. In the Elements, Euclid deduced the principles of what is now called Euclidean geometry from…
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Galileo Galilei and his Telescope

Galileo Galilei and his Telescope

On August 25, 1609, Galileo Galilei publicly demonstrated his newly built telescope to Venetian lawmakers. Besides its astronomical value Galileo‘s telescope was also a profitable sideline for him selling telescopes to merchants who found them useful both at sea and as items of trade. Galileo published his initial telescopic astronomical observations in March 1610 in a brief treatise entitled Sidereus Nuncius (Starry Messenger). Galileo Galilei Education and Early Career Galileo Galilei came from an…
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David Fabricius and the Wonders of the Heavens

David Fabricius and the Wonders of the Heavens

On August 13, 1596, German theologian and astronomer David Fabricius discovered the first known periodic variable star, which he called Mira Ceti (The ‘Wonder’ in the stellar constellation ‘Whale’). David Fabricius – Early Years David Fabricius was born in Esens, Lower Saxony and received a pretty good education, learning mostly Latin. In Braunschweig, he first gained a few experiences in astronomy. His teacher introduced him to astronomy as well as mathematics before…
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The Phantastic Life of Cyrano de Bergerac – Forerunner of Enlightenment

The Phantastic Life of Cyrano de Bergerac – Forerunner of Enlightenment

On March 6, 1619, French novelist, playwright, epistolarian and duelist Savinien de Cyrano de Bergerac was born. A bold and innovative author, his work was part of the libertine literature of the first half of the seventeenth century. Today he is best known as the inspiration for Edmond Rostand’s most noted drama Cyrano de Bergerac, which, although it includes elements of his life, also contains invention and myth. Cyrano – as he is…
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The Assassination of Wallenstein

The Assassination of Wallenstein

On February 25, 1634, Bohemian military leader and politician Count Albrecht von Wallenstein was assassinated at Cheb in Bohemia. An imperial generalissimo of the Thirty Year’s War, and Admiral of the Baltic Sea, he had made himself ruler of the lands of the Duchy of Friedland in northern Bohemia. Wallenstein found himself released from imperial service in 1630 after Emperor Ferdinand grew wary of his ambition. “We act as we must. So…
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Jeremiah Horrocks and the Transit of Venus

Jeremiah Horrocks and the Transit of Venus

On January 3, 1641, English astronomer Jeremiah Horrocks passed away. He was the first scientist to demonstrate that the Moon moved around the Earth in an elliptical orbit and was the only person to predict the transit of Venus of 1639. Jeremiah Horrocks – Early Life Jeremiah Horrocks grew up in a well educated family and was introduced to astronomy in early years. He was occupied with many astronomical tasks as a young boy…
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Giuseppe Piazzi and the Discovery of Dwarf Planet Ceres

Giuseppe Piazzi and the Discovery of Dwarf Planet Ceres

On January 1, 1801, Italian Catholic priest of the Theatine order, mathematician, and astronomer Giuseppe Piazzi discovered Ceres, today known as the largest member of the asteroid belt. We already had several articles on almost all the planets of the Solar System, including the dwarf planets. [14] As you might know, our Solar System does not only comprise the Sun and the planets Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. Besides…
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Tycho Brahe – The Man with the Golden Nose

Tycho Brahe – The Man with the Golden Nose

On December 14, 1546, Danish nobleman and astronomer Tycho Brahe, known for his accurate and comprehensive astronomical and planetary observations was born. “Non haberi, sed esse.” “Not shine, but be.” – Tycho Brahe’s Election slogan Background Tycho Brahe was born at Knutstorp Castle, Scania, at that time Denmark, into a politically powerful family of noblemen and political advisors. He grew up with his uncle, also a nobleman, who supplied his nephew with a…
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