马尔代夫之夜的宝石
(原标题: Gems of a Maldivean Night)
2022-03-28
浏览次数: 20
银河系的最南端不仅有南十字星座的恒星，还有离太阳最近的恒星系统——半人马座阿尔法星。南十字星座的顶部是明亮的淡黄色恒星——天秤座伽玛星。从十字架伽玛穿过十字架底部的蓝色恒星阿克鲁克斯，指向南天极，就在3月初拍摄的特色照片中的小岛上方。那个岛就是印度洋上马尔代夫的马迪瓦鲁岛。在昏暗的银河系星光下，黑暗的煤袋星云位于十字架的左边，而在银河系的左边则是明亮的半人马座阿尔法星（左）和半人马座贝塔星（哈达尔）。半人马座阿尔法星A是一颗类似太阳的恒星，它锚定了一个有系外行星的三星系统，距离地球只有4.3光年。从半人马座阿尔法星上看，我们的太阳是一颗明亮的黄色恒星，位于仙后座。几乎超空间：随机APOD生成器
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The southernmost part of the Milky Way contains not only the stars of the Southern Cross, but the closest star system to our Sun -- Alpha Centauri. The Southern Cross itself is topped by the bright, yellowish star Gamma Crucis. A line from Gamma Crucis through the blue star at the bottom of the cross, Acrux, points toward the south celestial pole, located just above the small island in the featured picture -- taken in early March. That island is Madivaru of the Maldives in the Indian Ocean. Against faint Milky Way starlight, the dark Coal Sack Nebula lies just left of the cross, while farther left along the Milky Way are the bright stars Alpha Centauri (left) and Beta Centauri (Hadar). Alpha Centauri A, a Sun-like star anchoring a three-star system with exoplanets, is a mere 4.3 light-years distant. Seen from Alpha Centauri, our own Sun would be a bright yellowish star in the otherwise recognizable constellation Cassiopeia. Almost Hyperspace: Random APOD Generator
© Petr Horálek (ESO Photo Ambassador, Inst. of Physics in Opava)