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Edward Walter Maunder and the Sunspots

Edward Walter Maunder and the Sunspots

Harald Sack
On April 12, 1851, British astronomer Edward Walter Maunder was born. Maunder was the first to take the British Civil Service Commission examination for the post of photographic and spectroscopic assistant at the Royal Observatory, Greenwich. He is best remembered for his study of sunspots and the solar magnetic cycle that led to his identification of the period from 1645 to 1715 that is now known as the Maunder Minimum. “If we…
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geology
Sir Edward Sabine and the Earth’s Magnetic Field

Sir Edward Sabine and the Earth’s Magnetic Field

Tabea Tietz
On October 14, 1788, Irish astronomer, geophysicist, ornithologist, explorer, soldier and the 30th President of the Royal Society Sir Edward Sabine was born. His aim was to study the shape of the Earth and its magnetic field. He led the effort to establish a system of magnetic observatories in various parts of British territory all over the globe, and much of his life was devoted to their direction, and to analyzing their…
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astronomy
Rudolf Wolf and the Discovery of the Sunspot Cycle

Rudolf Wolf and the Discovery of the Sunspot Cycle

Harald Sack
On July 7, 1816, Swiss astronomer and astronomical historian Rudolf Wolf was born. Wolf’s main contribution was the discovery of the 11 year sunspot cycle and he was the co-discoverer of its connection with geomagnetic activity on Earth. Rudolf Wolf – Early Years and Academic Career Johann Rudolf Wolf was born in Fällanden, near Zurich, to Regula Gossweiler and Johannes Wolf, who was a minister in the Church. After studying at the Zurich Industrieschule,…
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astronomy

Johannes Fabricius and the Observation of Sunspots

Tabea Tietz
Probably on June 13, 1611, Frisian 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 1128. Johannes…
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