翻訳と辞書 |
Pultusk (meteorite) : ウィキペディア英語版 | Pultusk (meteorite)
Pultusk is an H5 ordinary chondrite meteorite which fell on 30 January 1868 in Poland. The event has been known as the stony meteorite shower with the largest number of pieces yet recorded in history.〔Mike D. Reynolds (2010)〕 Made up of rocky debris, it consists of pyroxene or olivine chondrules deployed in mass plagioclase, there being also kamacite. ==History== The fall occurred on January 30, 1868 at 7:00 pm near the town of Pułtusk, about northeast of Warsaw. Thousands of people witnessed a large fireball followed by detonations and a very large shower of small fragments falling on ice, land and houses within an area of about 127 sq km (appx. 78 sq. miles). The estimated number of fragments was 68780.〔J. Samsonowicz (1953)〕〔This statement has been contradicted by authors and scholars in the field of meteorite studies who estimated the number of fragments to be over 100.000, while other researchers have mentioned a misreading during the analysis of the chemical components and that a more precise number would be something no more than 3.000 stones. → → 〕 The fragments ranged in weight from half a gram to (the largest specimen). The overall estimated mass of the meteorites was . The vast majority of the fragments were small (few grams), known as ''Pultusk Peas''. The Pultusk meteorite is the largest stony meteorite shower ever recorded.〔Heide, Wlotzka (1995)〕
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Pultusk (meteorite)」の詳細全文を読む
スポンサード リンク
翻訳と辞書 : 翻訳のためのインターネットリソース |
Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.
|
|