夏普勒斯249和水母星云
(原标题: Sharpless 249 and the Jellyfish Nebula)
2026-02-27
浏览次数: 1632
水母星云通常是暗淡而难以捉摸的，在这张诱人的望远镜视野中被捕捉到。漂浮在星际海洋中，星云的左右被两颗明亮的恒星——双子星和双子星——锚定在这对天体双胞胎的脚下。水母星云本身位于照片的正中间，被看作是一个明亮的弧形辐射脊，带有悬垂的触手。事实上，这个宇宙水母是气泡状超新星遗迹IC 443的一部分，IC 443是一颗大质量恒星爆炸后膨胀的碎片云。爆炸发出的光第一次到达地球是在3万多年前。就像它在天体物理学水域中的表亲蟹状星云超新星遗迹一样，水母星云也被认为拥有一颗中子星，这是恒星核心坍塌后的超密度遗迹。一个编号为Sharpless 249的发射星云填充了左上角的区域。水母星云距离我们大约5000光年远。在这个距离上，这幅图像的宽度大约是300光年。
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Normally faint and elusive, the Jellyfish Nebula is caught in this alluring telescopic field of view. Floating in the interstellar sea, the nebula is anchored right and left by two bright stars, Mu and Eta Geminorum, at the foot of the celestial twins. The Jellyfish Nebula itself is right of center, seen as a brighter arcing ridge of emission with dangling tentacles. In fact, this cosmic jellyfish is part of bubble-shaped supernova remnant IC 443, the expanding debris cloud from a massive star that exploded. Light from the explosion first reached planet Earth over 30,000 years ago. Like its cousin in astrophysical waters the Crab Nebula supernova remnant, the Jellyfish Nebula is known to harbor a neutron star, the ultradense remnant of the collapsed stellar core. An emission nebula cataloged as Sharpless 249 fills the field at the upper left. The Jellyfish Nebula is about 5,000 light-years away. At that distance, this image would be about 300 light-years across.
© Katelyn Beecroft