土星對沖太陽
Saturn Opposite the Sun

來源:Jin Wang|發表日期:2025-09-25
今年 9 月 21 日,土星處於對沖位置,與地球天空中的太陽相對。土星離地球最近,也是一年中最亮的時候,太陽落山時土星升起,整夜在雙魚座較暗的恆星中閃耀於地平線之上。在這張來自中國西南部青藏高原青海冷湖天文臺的快照中,這顆外行星沉浸在被稱為 "逆光"(gegenschein)的微弱、瀰漫的橢圓形光暈中。漫反射光由太陽系黃道面上的行星際塵埃反向散射產生,與地球天空中的太陽相對。在這個漆黑的夜晚,土星和gegenschein 就像一隻巨大的眼睛,在地平線上五彩斑斕的氣流背景下,似乎在注視著天文臺的望遠鏡圓頂。
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.
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