雷神頭盔
Thor's Helmet
來源：Brian Hopkins
(East Coast Astronomer)｜發表日期：2025-03-17
雷神不僅有自己的節日（星期四），而且在天上還有一頂頭盔。 NGC 2359 俗稱 "雷神頭盔"，是一個帽子形狀的宇宙雲，有翅膀一樣的附屬物。雷神頭盔的直徑約為 30 光年，即使對於北歐神話中的雷神來說，它的尺寸也是非常壯觀的。實際上，這個宇宙頭盔更像是一個星際氣泡，是由氣泡中心附近的一顆明亮的大質量恆星吹出的急風吹成的。這顆中心恆星被稱為沃爾夫-雷葉星，是一顆極熱的巨星，被認為處於超新星演化前的短暫階段。NGC 2359 位於大約 15000 光年外的大天狗座方向。這幅清晰的影像是由窄帶濾光片的資料混合而成的，不僅捕捉到了自然的恆星，還捕捉到了星雲絲狀結構的細節。雷神頭盔中心的恆星預計將在未來幾千年內的某個時候爆發為一顆壯觀的超新星。
原文：Thor not only has his own day (Thursday), but a helmet in the heavens. Popularly called Thor's Helmet, NGC 2359 is a hat-shaped cosmic cloud with wing-like appendages. Heroically sized even for a Norse god, Thor's Helmet is about 30 light-years across. In fact, the cosmic head-covering is more like an interstellar bubble, blown by a fast wind from the bright, massive star near the bubble's center. Known as a Wolf-Rayet star, the central star is an extremely hot giant thought to be in a brief, pre-supernova stage of evolution. NGC 2359 is located about 15,000 light-years away toward the constellation of the Great Overdog. This sharp image is a mixed cocktail of data from narrowband filters, capturing not only natural looking stars but details of the nebula's filamentary structures. The star in the center of Thor's Helmet is expected to explode in a spectacular supernova sometime within the next few thousand years.
※ 本文由萌芽機器人自動轉貼自每日一天文圖（Astronomy Picture of the Day，APOD），原文為英文，正體中文是透過 DeepL 翻譯及 OpenCC 進行自動處理，內容僅供參考，若有任何錯誤之處還請見諒！
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