Copyright:Jin Wang
中文翻譯:
在星空中，有一顆名叫Saturn的行星，它在9月21日特別明亮，因為它正好和太陽相對著，從地球的天空看過去。當太陽下山時，Saturn與星星們一起在天空中閃亮亮的出現，特別是在魚座的星群中。在這張來自中國西南部青海零湖天文台的照片中，我們可以看到Saturn被一圈柔和的光圈圍繞著，這叫做geganschein，也就是反光。這個反光是由太陽的光線被在太陽系中漂浮的塵埃反射而形成的，它在天空中出現的時候，總是在與太陽對立的位置。就在這個黑暗的夜晚，Saturn和反光好像在凝視著天文台的望遠鏡圓頂，而背景中，還有美麗的空中光彩在閃爍。這情景讓人感到既神秘又美麗。
原文:
This year Saturn was at opposition on September 21, opposite the Sun in planet Earth’s sky. At its closest to Earth, Saturn was also at its brightest of the year, rising as the Sun set and shining above the horizon all night long among the fainter stars of the constellation Pisces. In this snapshot from the Qinghai Lenghu Observatory, Tibetan Plateau, southwestern China, the outer planet is immersed in a faint, diffuse oval of light known as the gegenschein or counter glow. The diffuse gegenschein is produced by sunlight backscattered by interplanetary dust along the Solar System’s ecliptic plane, opposite the Sun in planet Earth’s sky. Like a giant eye, on this dark night Saturn and gegenschein seem to stare down on the observatory’s telescope domes seen against a colorful background of airglow along the horizon.
來源:NASA每日圖片
