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Specola Guestbook | March 27, 1914: Radó von Kövesligethy

By Br. Robert Macke  |  31 May 2020

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This entry is part 44 of 100 in the series Specola Guestbook

Since its founding in 1891, many people have passed through the doors of the Vatican Observatory.  A quick perusal of our guestbook reveals several Names, including Popes, nobel laureates, astronauts, actors, and saints. Today’s guestbook entry is from March 27, 1914, when Radó von Kövesligethy made a visit.

Radó von Kövesligethy (1862-1934)

Next to his name, Prof. Radó von Kövesligethy (1862-1934) wrote simply, “Budapest.”  He was a Hungarian astronomer, physicist, and geophysicist.

This was the first of at least two visits to the Specola. He made a return visit ten years later, on May 27, 1924.

He is most notable for his work in blackbody radiation. He formulated a theory of blackbody radiation in 1886,  15 years before Max Planck.

He also formulated a theory of the inverse relationship between the luminosity of a source and the peak wavelength in its blackbody spectrum (known as Wien’s Law). This was done in 1885, 8 years before Wilhelm Wien. Wien received a Nobel prize in 1911, while Kövesligethy’s contribution remained unrecognized.

Why did Planck and Wien not reference Kövesligethy in their work, when evidence suggests that they were probably aware of him?  Balacz et al. (2008, Journal of Astronomical History and Heritage 11:124-133) suggests that there was a reluctance at least on the part of Wien to cite foreign research in the period leading up to and during World War I.

Kövesligethy made use of his spectral theory to estimate the surface temperature of several stars, including the Sun.

He also developed a theory to explain the Balmer lines in the spectrum of hydrogen.

In geophysics, he developed a technique for determining the epicenter of earthquakes. He founded the first seismological station in Hungary.

He was a member of the Hungarian Academy of Sciences and served as first general secretary of the International Association of Seismology

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More Posts in this Series:
"Specola Guestbook"

78  |  What Do We Lose When We Sacrifice Science?

By Br. Guy Consolmagno  |  27 May 2021  |  Sacred Space Astronomy

69  |  To err is human… to admit it, is science

By Br. Guy Consolmagno  |  25 Mar 2021  |  Sacred Space Astronomy

43  |  Specola Guestbook: January 19, 1914 – Frank Bigelow

By Br. Robert Macke  |  24 May 2020

45  |  Specola Guestbook | May 18, 1914: Walter F. Gale

By Br. Robert Macke  |  7 Jun 2020

46  |  Specola Guestbook | A few reflections

By Br. Robert Macke  |  14 Jun 2020

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