铅笔状星云超新星冲击波
(原标题: The Pencil Nebula Supernova Shock Wave)
2021-04-14
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这颗超新星的冲击波以每小时50万公里的速度穿过星际空间。在这幅精细的彩色合成图中，靠近中间并向上移动的是细细的、明亮的、编织的细丝，实际上是宇宙中发光气体片上的长涟漪，几乎是侧面的。它的编号为NGC 2736，其细长的外观与它的通俗名称铅笔星云相吻合。铅笔状星云长约5光年，距离我们800光年，但它只是船帆座超新星遗迹的一小部分。船帆座残骸本身直径约100光年，是一颗大约1.1万年前爆炸的恒星不断膨胀的残骸云。最初，冲击波以每小时数百万公里的速度移动，但现在已经大大放缓，席卷了周围的星际物质。在窄带宽视场特征图像中，红色和蓝色主要跟踪电离氢原子和氧原子的特征发光。传送门宇宙：随机APOD生成器
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This supernova shock wave plows through interstellar space at over 500,000 kilometers per hour. Near the middle and moving up in this sharply detailed color composite, thin, bright, braided filaments are actually long ripples in a cosmic sheet of glowing gas seen almost edge-on. Cataloged as NGC 2736, its elongated appearance suggests its popular name, the Pencil Nebula. The Pencil Nebula is about 5 light-years long and 800 light-years away, but represents only a small part of the Vela supernova remnant. The Vela remnant itself is around 100 light-years in diameter, the expanding debris cloud of a star that was seen to explode about 11,000 years ago. Initially, the shock wave was moving at millions of kilometers per hour but has slowed considerably, sweeping up surrounding interstellar material. In the featured narrow-band, wide field image, red and blue colors track, primarily, the characteristic glows of ionized hydrogen and oxygen atoms, respectively. Portal Universe: Random APOD Generator
© Greg Turgeon & Utkarsh Mishra