Article ID: CBB077797653

Theodor Grigull (1883-1947) (2018)

unapi

The high-school teacher Theodor Grigull (1883-1947) from Werden near Essen in Germany was also a keen amateur astronomer, who undertook a private solar eclipse expedition, and also derived the orbit of hypothetical Planet X beyond the orbit of Neptune.

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https://data.isiscb.org/isis/citation/CBB077797653/

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Authors & Contributors
Gingerich, Owen
Dick, Wolfgang R.
Bonifácio, Vitor
Gilmore, Gerard
Tausch-Pebody, Gudrun
Guski-Leinwand, Susanne
Concepts
Astronomy
Amateurs
Biographies
Eclipses; transits; occultations; conjunctions
Photography, astronomical
Instruments, astronomical
Time Periods
19th century
20th century, early
17th century
Renaissance
20th century
Early modern
Places
Germany
Great Britain
France
Nuremberg (Germany)
Spain
Portugal
Institutions
Royal Astronomical Society
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