莱蒙彗星和银河系
(原标题: Comet Lemmon and the Milky Way)
2025-11-25
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莱蒙彗星在它最好的时候是什么样子？图中就是一个例子，展示了三个距离不同的天体景象。最接近的奇观是中国喜马拉雅山的一部分，白雪皑皑的美丽山脉。中间的奇观是莱蒙彗星，它在本月初呈现出最美的风景，不仅右边有白色的尘埃尾巴，左边也有蓝色的太阳风扭曲的离子尾巴。在遥远的左边是我们银河系壮丽的中央平面，以黑暗的尘埃、红色的星云和数十亿颗类似太阳的恒星为特征。彗星C/2025 A6（莱蒙）在返回外太阳系的过程中已经开始褪色，而喜马拉雅山脉将在未来10亿年内逐渐被侵蚀。然而，银河系将在未来数十亿年继续存在——形成新的山脉和彗星。
查看原文解释
What did Comet Lemmon look like when it was at its best? One example is pictured here, featuring three celestial spectacles all at different distances. The closest spectacle is the snowcapped Meili Mountains, part of the Himalayas in China. The middle marvel is Comet Lemmon near its picturesque best early this month, showing not only a white dust tail trailing off to the right but its blue solar wind-distorted ion tail trailing off to the left. Far in the distance on the left is the magnificent central plane of our Milky Way Galaxy, featuring dark dust, red nebula, and including billions of Sun-like stars. Comet C/2025 A6 (Lemmon) is already fading as it heads back into the outer Solar System, while the Himalayan mountains will gradually erode over the next billion years. The Milky Way Galaxy, though, will live on -- forming new mountains and comets -- for many billions of years into the future.
© Lin Zixuan (Tsinghua U.)