Edmond Halley

Augustus de Morgan and Formal Logic

Augustus de Morgan and Formal Logic

On June 27, 1806, British mathematician and logician Augustus De Morgan was born. He formulated De Morgan‘s laws and introduced the term mathematical induction, a method of mathematical proof typically used to establish a given statement for all natural numbers. As a computer scientist, I am of course familiar with De Morgan‘s laws, which are fundamental for Boolean logic. De Morgan‘s laws are merely transformation rules for two of the basic operators…
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John Flamsteed – Astronomer Royal

John Flamsteed – Astronomer Royal

On March 4, 1675, the English King Charles II appoints John Flamsteed to “The King’s Astronomical Observator” – the first English Astronomer Royal, with an allowance of £100 a year. In the same year, the Royal Greenwich Observatory was founded and Flamsteed laid the foundation stone. Youth and Education John Flamsteed was born the only son of the merchant Stephen Flamsteed and his first wife Mary Spadman from Denby in the county…
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Edmond Halley besides the Eponymous Comet

Edmond Halley besides the Eponymous Comet

On November 8, 1656, English astronomer, geophysicist, mathematician, meteorologist, and physicist Sir Edmond Halley was born. Of course everybody has heard of Halley’s comet. We too already had an article on that topic [1]. But, Edmond Halley did much more than calculating the orbit of the eponymous comet. He compiled a catalogue of the stars of the Southern hemisphere, he also improved the sextant, and made observations about the ocean and the…
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Johannes Hevelius and his Selenographia

Johannes Hevelius and his Selenographia

On January 28, 1611, German astronomer Johannes Hevelius was born. From four years’ telescopic study of the Moon, using telescopes of long focal power, Hevelius compiled Selenographia (“Pictures of the Moon“, 1647), an atlas of the Moon with some of the earliest detailed maps. Family Background and Early Years Johannes Hevelius‘ father was a succesful merchant and pushed Johannes to follow his footsteps rather than pursue a scientific career. Hevelius was sent to Poland…
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