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Nicolaus Copernicus

astronomy
Johannes Schöner and his Famous Globes

Johannes Schöner and his Famous Globes

Harald Sack
On January 16, 1477, German polymath Johannes Schöner was born. He was a priest, astronomer, astrologer, geographer, cosmographer, cartographer, mathematician, globe and scientific instrument maker and editor and publisher of scientific tests. He is well known for making and printing geographical globes, notably his 1515 globe which is one of the earliest surviving globes produced following the discovery of new lands by Christopher Columbus. “Himmelan hat er dein Ziel Selbst hinaufgestellt. Sorg…
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astronomy
Ole Rømer and the Speed of Light

Ole Rømer and the Speed of Light

Tabea Tietz
On October 5, 1644 (or according to the old julian calendar September 25), Danish astronomer Ole Christensen Rømer was born. He became known by the first proof published in 1676 that the speed of light is finite and not infinite, respectively by the guidance, how the speed of light can be calculated by observation of the Jupiter moons. Ole Rømer – Early Years Ole Rømer was born in Århus, Denmark, to merchant and skipper…
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astronomy
Galileo Galilei and his Telescope

Galileo Galilei and his Telescope

Harald Sack
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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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
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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