阿塔卡马沙漠上的决斗乐队
(原标题: Dueling Bands over the Atacama Desert)
2026-07-06
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天空中的这两条带子是什么？更常见的波段在左边，是我们银河系的中心波段。我们的太阳在这个螺旋星系的圆盘上运行，所以从内部看，它在天空中看起来像一条亮度相当的带。不太常见的波段，在右边，是黄道光——太阳在我们的太阳系轨道尘埃反射的阳光。黄道光在太阳附近最亮，所以在日出之前或日落之后观看最好。在某些晚上，这条黄道光带可以显得非常突出。直到本世纪才发现，黄道带尘埃主要是由经过木星附近的彗星排出的。这张特色图片是大约一年前在智利的阿塔卡马沙漠拍摄的。
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What are these two bands in the sky? The more commonly seen band is on the left and is the central band of our Milky Way galaxy. Our Sun orbits in the disk of this spiral galaxy so that from inside, it appears as a band of comparable brightness all the way around the sky. The less commonly seen band, on the right, is zodiacal light -- sunlight reflected from dust orbiting the Sun in our Solar System. Zodiacal light is brightest near the Sun and so is best seen just before sunrise or just after sunset. On some evenings, this ribbon of zodiacal light can appear quite prominent. It was discovered only in this century that zodiacal dust was mostly expelled by comets that have passed near Jupiter. The featured image was captured about a year ago from the Atacama Desert in Chile.
© Julien Looten