光明、黑暗和尘土三合一
(原标题: The Light, Dark, and Dusty Trifid)
2024-08-10
浏览次数: 19
梅西耶20，俗称三裂星云，位于大约5000光年外，朝向星云丰富的人马座。我们银河系平面上的一个恒星形成区，三裂星云确实说明了三种不同类型的天文星云；红色发射星云由氢原子发出的光主导，蓝色反射星云由尘埃反射星光产生，深色星云中密集的尘埃云呈现轮廓。红色的发射区域被模糊的尘埃带大致分成三部分，这就是三裂星的流行名称。这个宇宙云团的直径超过40光年，覆盖了地球天空中一个满月的面积。但是三裂星云太暗了，无法用肉眼看到。在黑暗的夜空下拍摄的超过75小时的图像数据被用来创造这张令人惊叹的望远镜视图。观赏：英仙座流星雨
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Messier 20, popularly known as the Trifid Nebula, lies about 5,000 light-years away toward the nebula rich constellation Sagittarius. A star forming region in the plane of our galaxy, the Trifid does illustrate three different types of astronomical nebulae; red emission nebulae dominated by light from hydrogen atoms, blue reflection nebulae produced by dust reflecting starlight, and dark nebulae where dense dust clouds appear in silhouette. The reddish emission region, roughly separated into three parts by obscuring dust lanes, is what lends the Trifid its popular name. The cosmic cloud complex is over 40 light-years across and would cover the area of a full moon on planet Earth's sky. But the Trifid Nebula is too faint to be seen by the unaided eye. Over 75 hours of image data captured under dark night skies was used to create this stunning telescopic view. Watch: The Perseid Meteor Shower
© Robert Edelmaier and Gabriele Gegenbauer