美丽的三重奏
(原标题: A Beautiful Trifid)
2022-08-05
浏览次数: 12
美丽的三裂星云是对宇宙对比的研究。它也被称为M20,位于距离星云丰富的人马座约5000光年的地方。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。但是红色的发射区域,被模糊的尘埃带大致分成了三个部分,这就是三裂星这个流行名字的由来。在发射星云中心的上方和右侧,新生恒星雕刻的柱子和喷流出现在著名的哈勃太空望远镜对该区域的特写图像中。三裂星云直径约40光年。它太暗了,肉眼无法看到,几乎覆盖了地球天空中满月的面积。疏散星团M21正沿着画面右下角的边缘窥视着这张望远镜视野。
查看原文解释
The beautiful Trifid Nebula is a cosmic study in contrasts. Also known as M20, it 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. But the red emission region, roughly separated into three parts by obscuring dust lanes, is what lends the Trifid its popular name. Pillars and jets sculpted by newborn stars, above and right of the emission nebula's center, appear in famous Hubble Space Telescope close-up images of the region. The Trifid Nebula is about 40 light-years across. Too faint to be seen by the unaided eye, it almost covers the area of a full moon in planet Earth's sky. Open star cluster M21 just peeks into this telescopic field of view along the bottom right edge of the frame.
© Vikas Chander