John Herschel

Jacobus Cornelius Kapteyn and the Rotation of the Milky Way

Jacobus Cornelius Kapteyn and the Rotation of the Milky Way

On June 18, 1922, Dutch astronomer Jacobus Cornelius Kapteyn passed away. Kapteyn carried out extensive studies of the Milky Way and was the discoverer of evidence for galactic rotation. He used photography and statistical methods in determining the motions and spatial distribution of stars, the first major step after the works of William and John Herschel. Jacobus Cornelius Kapteyn was born on 19 January 1851 in Barneveld,in the Dutch province…
John Herschel – a Pioneer in Celestial Photography

John Herschel – a Pioneer in Celestial Photography

On March 7, 1792, English polymath, mathematician, astronomer, chemist, inventor, and experimental photographer Sir John Herschel was born. Herschel originated the use of the Julian day system in astronomy and named seven moons of Saturn and four moons of Uranus. He made many contributions to the science of photography, and investigated colour blindness and the chemical power of ultraviolet rays. Overall, he advocated an inductive approach to scientific experiment and…
The Great Moon Hoax

The Great Moon Hoax

Life on the Moon as described during the Hoax On September 16, 1835, the New York Sun concedes that her serial article about the sensational discoveries of astronomer Sir John Herschel about the Moon was only a hoax to increase their circulation. In the history of newspaper this scandal is referred to as ‘The Great Moon Hoax of 1835‘. The six articles, starting on August 25, 1835 consisted of stories…
Photographic Pioneer Henry Fox Talbot

Photographic Pioneer Henry Fox Talbot

Photo Pioneer Henry Fox Talbot (1800-1877)daguerrotype taken in 1844 On February 11, 1800, Henry Fox Talbot, British inventor and photography pioneer was born, who invented the calotype process, a precursor to photographic processes of the 19th and 20th centuries. Like other pioneers of early photography, Talbot not only was occupied with the processing technology, but also is known as an photographic artist. Moreover, Talbot’s talents also extended to mathematics, astronomy,…
Charles Babbage – The Father of the Computer who hated Street Music

Charles Babbage – The Father of the Computer who hated Street Music

Drawing of Charles Babbage‘s famous Difference Engine On October 18, 1871, Charles Babbage, mathematician, inventor and early computer scientist passed away. We think, everybody should know about Charles Babbage and his seminal work on the first mechanical universal computer, the Analytical Engine. Although the Analytical Engine never was build during his lifetime, due to the lack of according fine mechanics in the 19th century, Babbage sketched out everything necessary to…
Neptune, Oceanos, or ‘Le Verrier’ – How to name a new planet?

Neptune, Oceanos, or ‘Le Verrier’ – How to name a new planet?

Neptune from Voyager 2 in 1989(© NASA) On June 9, 1812, German astronomer Johann Gottfried Galle was born. Also in Germany hardly anybody might know Galle today. Well, maybe except most astronomers, who will certainly know him, because he has discovered the planet Neptune. No, he didn’t do it all by himself… Actually, Galle had sent a copy of his PhD thesis, in which he discussed Ole Rømer’s observation of…
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