Discovery of the variations in brightness of Algol
Scientific career
Fields
astronomy
mathematics
physics
economics
Institutions
University of Bologna
University of Padua
Notable students
Domenico Guglielmini
Francesco Bianchini
Gianantonio Davia
Luigi Ferdinando Marsili
Geminiano Montanari (1 June 1633 – 13 October 1687) was an Italian astronomer, lens-maker, and proponent of the experimental approach to science. He was a member of various learned academies, notably the Accademia dei Gelati. Montanari's famous students include Domenico Guglielmini, Francesco Bianchini, Gianantonio Davia and Luigi Ferdinando Marsili.
He is best known for his observation, made around 1667, that the second-brightest star (called Algol as derived from its name in Arabic) in the constellation of Perseus varied in brightness. It is likely that others had observed this effect before, but Montanari was the first named astronomer to record it. The star's names in Arabic, Hebrew and other languages, all of which have a meaning of "ghoul" or "demon", imply that its unusual behaviour had long been recognised.
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GeminianoMontanari (1 June 1633 – 13 October 1687) was an Italian astronomer, lens-maker, and proponent of the experimental approach to science. He was...
designation Beta Persei, first had its variability recorded in 1667 by GeminianoMontanari. The mechanism for its being variable was first correctly explained...
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Gabel, German-Danish accountant and politician (b. 1617) 1687 – GeminianoMontanari, Italian astronomer and lens maker (b. 1633) 1694 – Samuel von Pufendorf...
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working assumptions in stellar astronomy. The Italian astronomer GeminianoMontanari recorded observing variations in luminosity of the star Algol in...
prompted by the theologian Richard Bentley. The Italian astronomer GeminianoMontanari recorded observing variations in luminosity of the star Algol in...
variation in the intensity of Algol first being recorded in 1670 by GeminianoMontanari. The name Algol means "demon star" (from Arabic: الغول al-ghūl),...
The variability of Algol was noted in 1667 by Italian astronomer GeminianoMontanari, but the periodic nature of its variations in brightness was not...
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first description of his new invention, the reflecting telescope. GeminianoMontanari detects the variability of the eclipsing binary Algol. Jean Picard...
8m.8 14m.4 5.8 201 d Mira variable (M) β Per (Algol) Perseus GeminianoMontanari, 1669 2m.12 3m.39 1.27 2.86730 d Eclipsing binary Algol type (EA/SD)...
September 28 – Francis Turretin, Swiss theologian (b. 1623) October 13 – GeminianoMontanari, Italian astronomer (b. 1633) October 19 – Giulio Bartolocci, Italian...
work on household savings and the dynamics of financial markets GeminianoMontanari (1633–1687), astronomer. Today, it is better known for his discovery...
variable star to be described was the eclipsing variable Algol, by GeminianoMontanari in 1669; John Goodricke gave the correct explanation of its variability...
the field of optics; first to describe the diffraction of light GeminianoMontanari (1633–1687), astronomer; known for his discovery of the variability...
Vailetti. Educated by Jesuits in Bologna, and by the Paduan astronomer, GeminianoMontanari, Bianchini spent most of his university years in Padua studying comets...
Anton Felice Marsili (L'Instabile) Ovidio Montalbani (L'Innestato) GeminianoMontanari (L'Elevatoso) Antonio Muscettola (Lo 'nfecondo) Pio Enea II Obizzi...
the mint at the Imperial Mint. During his stay, with his student GeminianoMontanari (1633-1687), he visited the imperial mines in the Carpathian mountains...
Joseph Chabanceau de La Barre, French composer (d. 1678) June 1 – GeminianoMontanari, Italian astronomer (d. 1687) June 16 – Jean de Thévenot, French...
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September 28 – Francis Turretin, Swiss theologian (b. 1623) October 13 – GeminianoMontanari, Italian astronomer (b. 1633) October 19 – Giulio Bartolocci, Italian...
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