Copyright:Julien Looten
中文翻譯:
哇！天空中有兩條神奇的光帶！左邊那條比較常見，是我們的銀河系中的中心帶，叫做Milky Way。因為我們的太陽在這個螺旋形的銀河中繞著走，所以從地球上看，就像一條亮亮的帶子，圍繞著我們的天空。右邊那條比較少見，叫做zodiacal light。這是太陽的光從圍著太陽轉的塵埃上反射過來的光芒，它在接近太陽的地方最亮，所以最好在日出前或日落後的時候觀看。有些晚上，這條zodiacal light可以非常明顯哦！這些小塵埃主要是來自在木星附近經過的彗星，這一點最近才被發現。這幅圖片是在智利的阿塔卡馬沙漠拍的，大約是一年前捕捉到的。
原文:
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.
來源:NASA每日圖片
