三叶星云的中心

NASA中文 2023年6月5日下午2:572023年6月6日下午2:29

2023年6月5日

In the Center of the Trifid Nebula
Image Credit & Copyright: Martin Pugh

Explanation: What’s happening at the center of the Trifid Nebula? Three prominent dust lanes that give the Trifid its name all come together. Mountains of opaque dust appear near the bottom, while other dark filaments of dust are visible threaded throughout the nebula. A single massive star visible near the center causes much of the Trifid’s glow. The Trifid, cataloged as M20, is only about 300,000 years old, making it among the youngest emission nebulas known. The star forming nebula lies about 9,000 light years away toward the constellation of the Archer (Sagittarius). The region pictured here spans about 20 light years.

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三叶星云的中心
影像提供与版权: Martin Pugh

说明: 三叶星云的中心发生了什么事？在星云中央，有三道鲜明的黝黑尘埃带会聚在该处，为这个星云博得三叶星云的令名。此外，影像底端有峰峦状的不透光尘埃云，以及散布在星云各处的丝状尘埃。影像中央的那颗大质量恒星，则是驱动三裂星云发光的主要能源。大约是300,000年稚龄、编录号为M20的三叶星云，是已知最年轻的发射星云之一。这团正在诞生恒星的星云，位在人马座方向，距离我们约有9,000光年远，而上图所呈现的区域跨幅约为20光年。