NGC 6888 :新月星雲
NGC 6888: The Crescent Nebula
來源:Team ARO|發表日期:2024-11-12
新月星雲是如何形成的? 新月星雲看起來就像一個正在形成的太空繭,在特寫圖片的中心可見,它是由其中心最亮的恆星形成的。 一個主要的起源假說認為新月星雲是在大約 25 萬年前開始形成的。 當時,中心的大質量恆星已經進化成為一顆沃爾夫-雷葉星(WR 136 ),在強大的恆星風中脫落了外層包膜,每 1 萬年噴射出相當於太陽質量的物質。 這種風衝擊著周圍前一階段遺留下來的氣體,將其壓縮成一系列複雜的外殼,並將其點亮。 新月星雲又名 NGC 6888 ,位於天鵝座大約 4700 光年之外。 WR 136 號恆星可能會在未來一百萬年的某個時候發生超新星爆發。 拼圖挑戰每日天文拼圖
原文:How was the Crescent Nebula created? Looking like an emerging space cocoon, the Crescent Nebula, visible in the center of the featured image, was created by the brightest star in its center. A leading progenitor hypothesis has the Crescent Nebula beginning to form about 250,000 years ago. At that time, the massive central star had evolved to become a Wolf-Rayet star (WR 136), shedding its outer envelope in a strong stellar wind, ejecting the equivalent of our Sun's mass every 10,000 years. This wind impacted surrounding gas left over from a previous phase, compacting it into a series of complex shells, and lighting it up. The Crescent Nebula, also known as NGC 6888, lies about 4,700 light-years away in the constellation of Cygnus. Star WR 136 will probably undergo a supernova explosion sometime in the next million years. Jigsaw Challenge: Astronomy Puzzle of the Day
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