南门二与桑德奎斯特169
影像来源与版权:Roberto Colombari

说明:在这幅南方星空的大视野影像里,顶缘附近最明亮的恒星是南门二。不过它更广为周知的名称,或许是离太阳最近的恒星系统─半人马座α。在影像里,它下方有广袤的暗星云复合体。这些不透光的星际尘埃云,包括以剪影之姿出现在南天银河富星场前方的Sandqvist(桑德奎斯特)169和172。南门二距离我们只有4.37光年远,然而这些黝黑尘埃云位于正在形成恒星的圆规座西分子云的边缘,远在2,500光年之外。这张广视野影像,涵盖南天宽约12度(24个满月)的天区。
翻译:“每日一天文图”成大物理分站

Rigil Kentaurus and Sandqvist 169
Image Credit & Copyright: Roberto Colombari

Explanation: Rigil Kentaurus is the bright star near the top of this broad southern skyscape. Of course it’s probably better known as Alpha Centauri, nearest star system to the Sun. Below it sprawls a dark nebula complex. The obscuring interstellar dust clouds include Sandqvist catalog clouds 169 and 172 in silhouette against the rich starfields along the southern Milky Way. Rigil Kent is a mere 4.37 light-years away, but the dusty dark nebulae lie at the edge of the starforming Circinus-West molecular cloud about 2,500 light-years distant. The wide-field of view spans over 12 degrees (24 full moons) across southern skies.
Astronomy Picture of the Day 04/13/2019