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
Morrison, Leslie V.
Tausch-Pebody, Gudrun
Concepts
Astronomy
Amateurs
Biographies
Eclipses; transits; occultations; conjunctions
Photography, astronomical
Venus
Time Periods
20th century, early
19th century
17th century
Renaissance
20th century
Early modern
Places
Germany
Great Britain
France
Nuremberg (Germany)
Portugal
Institutions
Royal Astronomical Society
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