Terrella (nonfiction): Difference between revisions
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[[File:Birkeland_terrella_spiral_nebula.jpg|thumb|Kristian Birkeland's magnetised terrella. In this experiment, he noted two spirals which he considered may be similar to that of spiral nebulae.]]A '''terrella''' (Latin for "little earth") is a small magnetised model ball representing the Earth, that is thought to have been invented by the English physician [[William Gilbert (nonfiction)|William Gilbert]] while investigating magnetism, and further developed 300 years later by the Norwegian scientist and explorer [[Kristian Birkeland (nonfiction)|Kristian Birkeland]], while investigating the aurora. | [[File:Birkeland_terrella_spiral_nebula.jpg|thumb|Kristian Birkeland's magnetised terrella. In this experiment, he noted two spirals which he considered may be similar to that of spiral nebulae.]] | ||
[[File:Gilbert_terrella.png|thumb|[[William Gilbert (nonfiction)|William Gilbert]]'s terrella.]] | |||
A '''terrella''' (Latin for "little earth") is a small magnetised model ball representing the Earth, that is thought to have been invented by the English physician [[William Gilbert (nonfiction)|William Gilbert]] while investigating magnetism, and further developed 300 years later by the Norwegian scientist and explorer [[Kristian Birkeland (nonfiction)|Kristian Birkeland]], while investigating the aurora. | |||
Terrellas had been used until the late 20th century to attempt to simulate the Earth's magnetosphere, but have now been replaced by computer simulations. | Terrellas had been used until the late 20th century to attempt to simulate the Earth's magnetosphere, but have now been replaced by computer simulations. | ||
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== Nonfiction cross-reference == | == Nonfiction cross-reference == | ||
* [[Kristian Birkeland (nonfiction)]] | |||
* [[William Gilbert (nonfiction)]] | |||
* [[Mathematician (nonfiction)]] | * [[Mathematician (nonfiction)]] | ||
* [[Mathematics (nonfiction)]] | * [[Mathematics (nonfiction)]] | ||
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* [https://en.wikipedia.org/wiki/Terrella Terrella] @ Wikipedia | * [https://en.wikipedia.org/wiki/Terrella Terrella] @ Wikipedia | ||
[[Category:Nonfiction (nonfiction)]] | [[Category:Nonfiction (nonfiction)]] | ||
[[Category:Machines (nonfiction)]] | [[Category:Machines (nonfiction)]] | ||
Revision as of 14:04, 3 September 2018
William Gilbert's terrella.
A terrella (Latin for "little earth") is a small magnetised model ball representing the Earth, that is thought to have been invented by the English physician William Gilbert while investigating magnetism, and further developed 300 years later by the Norwegian scientist and explorer Kristian Birkeland, while investigating the aurora.
Terrellas had been used until the late 20th century to attempt to simulate the Earth's magnetosphere, but have now been replaced by computer simulations.
In the News
Fiction cross-reference
Nonfiction cross-reference
- Kristian Birkeland (nonfiction)
- William Gilbert (nonfiction)
- Mathematician (nonfiction)
- Mathematics (nonfiction)
External links:
- Terrella @ Wikipedia