NGC 6366 vs 47 Ophiuchi
NGC 6366 vs 47 Ophiuchi

來源:Massimo Di Fusco|發表日期:2025-05-23
大多數球狀星團都遊蕩在銀河系的光暈中,但球狀星團 NGC 6366 靠近銀河系平面。球狀星團距離蛇夫座約 12000 光年,從地球上看去,星團的星光被銀河系的星際塵埃遮擋,變得暗淡發紅。因此,在這個望遠鏡場景中,NGC 6366 的恆星看起來幾乎是金色的,尤其是在相對明亮、偏藍的鄰近恆星 47 Ophiuchi 旁邊。與遙遠的 NGC 6366 中十幾萬顆引力結合的恆星相比, 47 Oph 本身只是一個雙星系統,距離只有 100 光年。不過, 47 Oph 的共軌恆星距離太近,在影像中無法單獨分辨。
原文:Most globular star clusters roam the halo of our Milky Way galaxy, but globular cluster NGC 6366 lies close to the galactic plane. About 12,000 light-years away toward the constellation Ophiuchus, the cluster's starlight is dimmed and reddened by the Milky Way's interstellar dust when viewed from planet Earth. As a result, the stars of NGC 6366 look almost golden in this telescopic scene, especially when seen next to relatively bright, bluish, and nearby star 47 Ophiuchi. Compared to the hundred thousand stars or so gravitationally bound in distant NGC 6366, 47 Oph itself is a binary star system a mere 100 light-years away. Still, the co-orbiting stars of 47 Oph are too close together to be individually distinguished in the image.
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