IC 443：水母星云
(原标题: IC 443: The Jellyfish Nebula)
2023-12-26
浏览次数: 16
为什么这只水母在星海中游泳？在明亮的双星埃塔附近漂流，水母星云从中心左侧明亮的弧形脊状辐射中伸出它的触角。事实上，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。就像它在天文水域的表亲一样，蟹状星云超新星遗迹IC 443已知含有一颗中子星——坍缩恒星核心的遗迹。水母星云距离我们大约5000光年远。在这个距离上，这幅特色图像的跨度约为140光年。你的天空惊喜：APOD在你的生日上展示了什么照片？(1995后)
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Why is this jellyfish swimming in a sea of stars? Drifting near bright star Eta Geminorum, seen at the right, the Jellyfish Nebula extends its tentacles from the bright arcing ridge of emission left of center. In fact, the 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 astronomical waters, the Crab Nebula supernova remnant IC 443 is known to harbor a neutron star -- the remnant of the collapsed stellar core. The Jellyfish Nebula is about 5,000 light-years away. At that distance, the featured image would span about 140 light-years across. Your Sky Surprise: What picture did APOD feature on your birthday? (post 1995)
© David Payne