2025年12月29日
M1: The Crab Nebula
Image Credit & Copyright: Alan Chen
Explanation: This is the mess that is left when a star explodes. The Crab Nebula, the result of a supernova seen in 1054 AD, is filled with mysterious filaments. The filaments are not only tremendously complex but appear to have less mass than expelled in the original supernova and a higher speed than expected from a free explosion. The featured image was taken by an amateur astronomer in Leesburg, Florida, USA over three nights last month. It was captured in three primary colors but with extra detail provided by specific emission by hydrogen gas. The Crab Nebula spans about 10 light years. In the Nebula’s very center lies a pulsar: a neutron star as massive as the Sun but with only the size of a small town. The Crab Pulsar rotates about 30 times each second.
Explore the Universe: Random APOD Generator
Tomorrow’s picture: artificial comet
M1: 蟹状星云
影像提供与版权: Alan Chen
说明: 这就是恒星爆炸后留下的残骸。蟹状星云是1054年 超新星爆发的产物，内部充满了神秘的丝状结构。这些丝状结构不仅极其复杂，且其质量似乎比原始超新星爆发时所抛射出的质量还少，而其速度则比自由爆炸所预期的更快。这幅主题影像是由一位业余天文学家上个月在位于美国 佛罗里达州的利斯堡所拍摄，历时三个晚上。影像是以三原色拍摄，并利用氢气的特定辐射提供了额外的细节。蟹状星云的跨度约为10光年。在星云的中心有一颗脉冲星：一颗质量与太阳相当，但体积却只有 小镇大小的中子星。蟹状星云脉冲星每秒旋转约30次。
探索宇宙: 随机每日天文图产生器
明日的图片: artificial comet
