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David Fabricius

astronomy
Simon Marius and his Astronomical Discoveries

Simon Marius and his Astronomical Discoveries

Harald Sack
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’ Early Years Simon Marius was…
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astronomy
David Fabricius and the Wonders of the Heavens

David Fabricius and the Wonders of the Heavens

Tabea Tietz
On August 13, 1596, Frisian theologian and astronomer David Fabricius observed the first known periodic variable star, which he called Mira Ceti (The ‘Wonder’ in the stellar constellation ‘Whale’). David Fabricius – Early Years David Fabricius was born in Esens, East Frisia, the son of a blacksmith.  Not much is known about his childhood and youth. He attended the Latin schools in Norden and probably in Braunschweig. He later once remarked that his teacher Heinrich…
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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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