银河

2021年07月03日

Along the Milky Way
Image Credit & Copyright: Rolf Weisenfeld

Explanation: You can’t walk along the Milky Way. Still, under a dark sky you can explore it. To the eye the pale luminous trail of light arcing through the sky on a dark, moonless night does appear to be a path through the heavens. The glowing celestial band is the faint, collective light of distant stars cut by swaths of obscuring interstellar dust clouds. It lies along the plane of our home galaxy, so named because it looks like a milky way. Since Galileo’s time, the Milky Way has been revealed to telescopic skygazers to be filled with congeries of innumerable stars and cosmic wonders.

Tomorrow’s picture: Facing Mars

银河
影像提供与版权: Rolf Weisenfeld

说明: 你无法在银河（Milky Way）上漫步。话虽如此，在幽暗的夜空下，你可以尽情探索它。在肉眼里，银河淡淡的乳白晕光，在无月光干扰的黑夜里，形似一道贯过长天的步道。这道散发辉光的光带，聚集了众多暗淡遥远恒星的星光，上头有带状不透光星际尘埃云所划出的暗痕。它是我们所在的银河系之中央盘面，英文名称来自它看似一道乳河。从伽利略的年代起，用望远镜巡天的观星人，就已发现银河聚集了以数计的恒星和宇宙珍宝。

明日的图片: Facing Mars