Wilson, Alexander

Japanese: ウィルソン,Alexander - うぃるそん
Wilson, Alexander

...They have also discovered that sunspots appear in groups at definite bands of latitude.
[Wilson effect]
In 1769, about 150 years after modern observations began, A. Wilson discovered that when sunspots are near the edge of the sun, the penumbra on the central side of the sun becomes narrower than the edge side or is almost invisible, and he thought that this was because the sunspot is depressed lower than the surrounding area. Current measurements suggest that this depression is about 500 to 1000 km. …

*Some of the terminology that mentions "Wilson, Alexander" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…また黒点が群をなして定まった緯度帯に現れることを見つけている。
[ウィルソン効果]
 近代観測が始まって約150年たった1769年に,A.ウィルソンは黒点が太陽の縁近くにあるとき,太陽の中心側の半暗部が縁側よりも狭くなったり,ほとんど見えなくなることを見つけ,これは黒点がまわりよりも低くくぼんでいるためと考えた。現在の測定ではこのくぼみは500~1000km程度とされている。…

※「ウィルソン,Alexander」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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