美国宇航局科学
(原标题: NASA Science)
2026-10-05
浏览次数: 4754
宽边帽星系的深层图像揭示了惊喜。M104被命名为草帽星系，因为在较短的曝光下，它看起来像一顶帽子。这个巨大星系的一个关键特征是围绕着圆盘星系中心的黑暗尘埃边缘。然而，更长时间的曝光会带来一个毛茸茸的过去，在那里，一个明亮、朦胧的光晕被揭示出来，它延伸到中央圆盘之外，包含许多未解之谜的恒星。令人惊讶的是，在这片恒星雾霾中，可以看到一些结构，其中包括一个对角环。这些结构和潮汐流提供了新的证据，证明M104有一个暴力的过去，肯定是较小星系碰撞和合并的结果。光从宽约15万光年的草帽星系到达我们需要大约3000万年的时间。这张特色图片是在2026年中期从纳米比亚拍摄的，历时7天。你的天空惊喜：APOD在你的生日上展示了什么照片？（1995年后）明天的照片：一个微笑
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A deep image of the Sombrero galaxy reveals surprises. M104 is named the Sombrero galaxy because, on shorter exposures, it looks like a hat. A key defining feature of this huge galaxy is a dark brim of dust that circles the disk galaxy's center. A much longer exposure, however, brings up a hairy past where a bright, hazy halo is revealed that extends well past the central disk and contains many unresolved stars. Surprisingly, in this stellar haze, structures can be seen that include a diagonal ring. These structures and tidal streams provide fresh evidence that M104 had a violent past and is surely the result of collisions and mergers of smaller galaxies. Light takes about 30 million years to reach us from the Sombrero galaxy, which fully spans about 150 thousand light years across. The featured image was taken over seven days in mid-2026 from Namibia.Your Sky Surprise: What picture did APOD feature on your birthday? (post 1995)Tomorrow's picture: a smile