Spherical Earth
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| - | + | The concept of a '''[[Sphere|spherical]] [[Earth]]''' dates back to ancient [[Greek philosophy]] from around the 6th century BC, but remained a matter of philosophical speculation until the 3rd century BC when [[Hellenistic astronomy]] established the spherical [[shape of the earth]] as a physical given. | |
| - | '''Johannes de Sacrobosco''' or '''Sacro Bosco''' ('''John of Holywood''', c. 1195 – c. 1256) was a [[scholar]], [[monk]], and [[astronomer]] (probably [[English people|English]], but possibly [[Irish people|Irish]] or [[Scottish people|Scottish]]) who taught at the [[University of Paris]] and wrote the authoritative mediaeval astronomy text ''[[Tractatus de Sphaera]]''. | + | |
| - | ==''Tractatus de Sphaera''== | + | |
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| - | About 1230, his best known work, ''Tractatus de Sphaera'', was published. In this book, Sacrobosco gives a readable account of the [[Geocentric_model#Ptolemaic_system|Ptolemaic]] [[universe]]. It was required reading by students in all Western European universities for the next four centuries. Though principally about the heavens it contains a clear description of the [[Earth]] as a sphere and its popularity shows the nineteenth-century opinion that medieval scholars after this date thought the Earth was flat as a fabrication (See: [[Flat Earth]]). | + | |
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| ==See also== | ==See also== | ||
| - | *[[List of Roman Catholic scientist-clerics]] | + | *[[Celestial sphere]] |
| + | *[[Earth radius]] | ||
| + | *[[Figure of the Earth]] | ||
| + | *[[Flat Earth]] | ||
| + | *[[Geographical distance]] | ||
| + | *[[Myth of the Flat Earth]] | ||
| + | *[[Physical geodesy]] | ||
| + | *[[Terra Australis]] | ||
| + | *[[WGS 84]] | ||
| {{GFDL}} | {{GFDL}} | ||
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The concept of a spherical Earth dates back to ancient Greek philosophy from around the 6th century BC, but remained a matter of philosophical speculation until the 3rd century BC when Hellenistic astronomy established the spherical shape of the earth as a physical given.
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See also
- Celestial sphere
- Earth radius
- Figure of the Earth
- Flat Earth
- Geographical distance
- Myth of the Flat Earth
- Physical geodesy
- Terra Australis
- WGS 84
Unless indicated otherwise, the text in this article is either based on Wikipedia article "Spherical Earth" or another language Wikipedia page thereof used under the terms of the GNU Free Documentation License; or on research by Jahsonic and friends. See Art and Popular Culture's copyright notice.
