Galileo Galilei

John Milton and his great Epic Paradise Lost

John Milton and his great Epic Paradise Lost

On December 9, 1608, English poet, polemicist, a scholarly man of letters, and a civil servant John Milton, was born. He is best known for his epic poem Paradise Lost, the Biblical story of the Fall of Man: the temptation of Adam and Eve by the fallen angel Satan and their expulsion from the Garden of Eden. “Of Man’s first disobedience, and the fruit Of that forbidden tree whose mortal taste Brought…
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Much More Powerful Than Expected – Kepler’s Supernova

Much More Powerful Than Expected – Kepler’s Supernova

On October 17, 1604, the famous German astronomer Johannes Kepler [5] started his observations of the 1604 supernova, named after him as Kepler’s Supernova or Kepler’s Star. Special about this ‘new’ star was it being the very last observed supernova in our own galaxy, the Milky way. First Sightings The supernova was first observed on 9 October 1604 by Ilario Altobelli in Verona and Raffaello Gualterotti in Florence, a few days before Kepler…
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Cogito Ergo Sum – The Philosophy of René Descartes

Cogito Ergo Sum – The Philosophy of René Descartes

On March 31, 1596, French philosopher, mathematician, and writer René Descartes was born. The Cartesian coordinate system is named after him, allowing reference to a point in space as a set of numbers, and allowing algebraic equations to be expressed as geometric shapes in a two-dimensional coordinate system. He is credited as the father of analytical geometry, the bridge between algebra and geometry, crucial to the discovery of infinitesimal calculus and analysis.…
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Giordano Bruno and the Wonders of the Universe

Giordano Bruno and the Wonders of the Universe

On February 17, 1600, Dominican friar, philosopher, mathematician and astronomer Giordano Bruno was burned on the stake after the Roman Inquisition found him guilty of heresy. His cosmological theories went beyond the Copernican model in proposing that the Sun was essentially a star, and moreover, that the universe contained an infinite number of inhabited worlds populated by other intelligent beings. Giordano Bruno was born as Filippo Bruno in Nola,  in the Kingdom…
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Jupiter and the Galilean Moons

Jupiter and the Galilean Moons

Montage of Jupiter’s four Galilean moons, in a composite image from top to bottom: Io, Europa, Ganymede, Callisto ©NASA On January 7, 1610, physicist and astronomer Galileo Galilei turned his new telescope to the nocturnal sky to watch the planet Jupiter and discovered the eponymous four moons of Jupiter, Io, Europa, Ganimede, and Callisto.[1,2] Based only on uncertain descriptions of the first practical telescope which the Dutch lens maker Hans Lippershey [3] tried to…
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Standing on the Shoulders of Giants – Sir Isaac Newton

Standing on the Shoulders of Giants – Sir Isaac Newton

Sir Isaac Newton (1643-1727), Portrait by Sir Godfrey Kneller (1689) On January 4, 1643 [N.S.] (25 December 1642 [O.S.]), Sir Isaac Newton, famous physicist, mathematician, astronomer, natural philosopher, alchemist and theologian, was born. With his Principia Newton laid the foundation of modern classical mechanics. Besides he constructed the very first reflecting telescope and independent of Gottfried Wilhelm Leibniz developed differential and integral calculus [10]. “We are to admit no more causes of natural…
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Johannes Fabricius and the Sunspots

Johannes Fabricius and the Sunspots

Probably on June 13, 1611, Dutch astronomer Johannes Fabricius published his Narratio de maculis in sole observatis et apparente earum cum sole conversione (Account of Spots Observed on the Sun and of Their Apparent Rotation with the Sun), which counts as the first published description of sunspots. Nevertheless, sunspots have been discovered earlier, as the first record of a sunspot drawing dates back into the 12th century to John of Worcester in…
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Simon Marius and his Astronomical Discoveries

Simon Marius and his Astronomical Discoveries

On January 20 (or January 10 according to the old Julian calendar), 1573, German astronomer Simon Marius was born. Marius was pupil of Tycho Brahe, one of the earliest users of the telescope and the first in print to make mention the Andromeda nebula. He studied and named the four largest moons of Jupiter that he claimed to have them discovered independently and even before Galileo. Simon Marius was born in Gunzenhausen, near…
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Cavalieri’s Principle

Cavalieri’s Principle

On November 30, 1648, Italian mathematician Bonaventura Cavalieri passed away. He is known for his work on the problems of optics and motion, work on the precursors of infinitesimal calculus, and the introduction of logarithms to Italy. Cavalieri’s principle in geometry partially anticipated integral calculus. “Rigor is the concern of philosophy not of geometry.” (Bonaventura Cavalieri) Born at Milan, Cavalieri was given the name Francesco when he was born. His father’s name was…
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Nicolas-Claude Fabri de Peiresc and the Discovery of the Orion Nebula

Nicolas-Claude Fabri de Peiresc and the Discovery of the Orion Nebula

Around November 25, 1610, French astronomer and savant Nicolas-Claude Fabri de Peiresc discovered the Orion Nebula, a diffuse nebula situated south of Orion’s Belt in the constellation of Orion. It is one of the brightest nebulae, and is visible to the naked eye in the night sky. De Peiresc and his “Discovery” De Peiresc’s interests as a scholar were widely dispersed. He collected ancient gems and coins, he promoted young artists by…
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