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Tycho Brahe

astronomy
David Fabricius and the Wonders of the Heavens

David Fabricius and the Wonders of the Heavens

Tabea Tietz
On August 13, 1596, Frisian theologian and astronomer David Fabricius observed 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, East Frisia, the son of a blacksmith.  Not much is known about his childhood and youth. He attended the Latin schools in Norden and probably in Braunschweig. He later once remarked that his teacher Heinrich…
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astronomy
John Dee and his World of Science and Magic

John Dee and his World of Science and Magic

Harald Sack
On July 13, 1527, Welsh mathematician, astronomer, astrologer, occultist, navigator, imperialist and consultant to Queen Elizabeth I, John Dee was born. He is considered one of the most learned men of his age. Besides being an ardent promoter of mathematics and a respected astronomer, in his later years he immersed himself in the worlds of magic, astrology and Hermetic philosophy. One of his aims was attempting to commune with angels in order to…
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astronomy
Nicolaus Copernicus and the Heliocentric Model

Nicolaus Copernicus and the Heliocentric Model

Harald Sack
On February 19, 1473, Renaissance mathematician and astronomer Nicolaus Copernicus was born, who established the heliocentric model, which placed the Sun, rather than the Earth, at the center of the universe. With the publication of his research he started the so-called Copernican Recolution, which started a paradigm shift away from the former Ptolemaic model of the heavens, which postulated the Earth at the center of the universe, towards the heliocentric model with the…
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astronomy
Giovanni Domenico Cassini and the Moons of Saturn

Giovanni Domenico Cassini and the Moons of Saturn

Harald Sack
On December 23, 1672, Italian astronomer Giovanni Domenico Cassini discovered Rhea, the 2nd largest of the 62 Saturn moons that are known by today. Background and Education Giovanni Cassini Cassini was born in Perinaldo (Liguria) on June 8, 1625. He married the rich Geneviève de Laistre, became a French citizen in 1673 and began to write his first name Jean-Dominique. Cassini studied at the Jesuit College in Genoa and Bologna. Through the…
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astronomy
Tycho Brahe – The Man with the Golden Nose

Tycho Brahe – The Man with the Golden Nose

Harald Sack
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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astronomy
And Kepler Has His Own Opera – Kepler’s 3rd Planetary Law

And Kepler Has His Own Opera – Kepler’s 3rd Planetary Law

Harald Sack
On May 15, 1618, famous astronomer Johannes Kepler discovered the 3rd and also last of his planetary laws, and concluded the general revolution of our celestial world that started with Nicolaus Copernicus about 100 years earlier.[1] And that made him rather popular as he still is today. Did you know that there is a Kepler crater on the Moon, a Kepler crater on Mars, a Kepler asteroid, a Kepler supernova, of course there…
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astronomy
Abu Ma’shar – the Greatest Astronomer of Baghdad

Abu Ma’shar – the Greatest Astronomer of Baghdad

Tabea Tietz
Dear reader, we’ve realized that our daily blog on History of Science somehow is focussed on the Western view of history and the World. Of course it’s because we ourselves are part of this Western world of science. Nevertheless, we have also to include scientists and other people important for the history of science, who are not part of this Western canon of science. Today, we begin with the famous Persian astrologer, astronomer, and philosopher Abu Ma’shar al-Balkhi. Probably on August 10, 787, Persian astrologer Abu Ma’shar, Latinized as Albumasar,…
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