John Herschel

William Parsons and his Very Large Telescopes

William Parsons and his Very Large Telescopes

On June 17, 1800, Irish astronomer William Parsons, 3rd Earl of Rosse, was born. As an astronomer, he had several telescopes built, among them his 72-inch telescope, built in 1845 and colloquially known of as the “Leviathan of Parsonstown“, which was the world’s largest telescope, in terms of aperture size, until the early 20th century. In 1848, he found and named the Crab Nebula (because he thought it resembled a crab), by which name…
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John William Draper – Chemist and Photo Pioneer

John William Draper – Chemist and Photo Pioneer

On May 5, 1811, American philosopher, physician, chemist, historian and photographer John William Draper was born. He is credited with producing the first clear photograph of a female face (1839–40) and the first detailed photograph of the Moon (1840). He was also the first president of the American Chemical Society (1876–77) and a founder of the New York University School of Medicine. John William Draper – Early Years John William Draper was…
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