弗莱明的三角形小精灵
(原标题: Fleming's Triangular Wisp)
2023-11-21
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作为面纱星云的一部分，这些混乱而纠结的震动发光气体在地球的天空中向天鹅座方向扩散。面纱星云本身是一个巨大的超新星遗迹，是一颗大质量恒星死亡爆炸后形成的不断膨胀的星云。最初的超新星爆炸发出的光可能在5000多年前到达地球。发光的细丝实际上更像是一张纸上的长波纹，几乎是在边缘上看的，它们被电离的氢原子（显示为红色）和氧（显示为蓝色）很好地分开了。面纱星云也被称为天鹅座环，编号为NGC 6979，现在它的直径大约是满月的6倍。考虑到它的估计距离是2400光年，这束光的长度相当于30光年。哈佛大学天文台的一位主任经常把它称为皮克林三角，也许以它的发现者、天文学家威廉娜·弗莱明（Williamina Fleming）的名字命名为弗莱明三角更合适。更新：在电报上关注APOD
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These chaotic and tangled filaments of shocked, glowing gas are spread across planet Earth's sky toward the constellation of Cygnus as part of the Veil Nebula. The Veil Nebula itself is a large supernova remnant, an expanding cloud born of the death explosion of a massive star. Light from the original supernova explosion likely reached Earth over 5,000 years ago. The glowing filaments are really more like long ripples in a sheet seen almost edge on, remarkably well separated into the glow of ionized hydrogen atoms shown in red and oxygen in blue hues. Also known as the Cygnus Loop and cataloged as NGC 6979, the Veil Nebula now spans about 6 times the diameter of the full Moon. The length of the wisp corresponds to about 30 light years, given its estimated distance of 2,400 light years. Often identified as Pickering's Triangle for a director of Harvard College Observatory, it is perhaps better named for its discoverer, astronomer Williamina Fleming, as Fleming's Triangular Wisp. New: Follow APOD on Telegram
© Cristiano Gualco