哈勃拍摄的蝌蚪星系
(原标题: The Tadpole Galaxy from Hubble)
2024-07-15
浏览次数: 18
为什么这个星系有这么长的尾巴？在这张令人惊叹的远景图中，基于哈勃遗产档案的图像数据，遥远的星系形成了一个引人注目的背景，被破坏的螺旋星系Arp 188，蝌蚪星系。这只宇宙蝌蚪距离北方的龙星座（天龙座）只有4.2亿光年。它引人注目的尾巴长约28万光年，以巨大明亮的蓝色星团为特征。有一种说法是，一个更紧凑的入侵星系从Arp 188前面穿过——在这张图中从右到左——并被它们的引力甩在蝌蚪星系后面。在近距离接触中，潮汐力将螺旋星系的恒星、气体和尘埃拉出，形成了壮观的尾巴。入侵星系本身，估计位于蝌蚪星系后面约30万光年，可以通过右上方的前景旋臂看到。蝌蚪星系和它的地球同名星系一样，随着年龄的增长，它可能会失去尾巴，尾巴上的星团会形成这个大型螺旋星系的小卫星。世界语言的APOD：阿拉伯语（IG）、保加利亚语、加泰罗尼亚语、中文（北京）、中文（台湾）、捷克语、荷兰语、波斯语、法语、德语、希伯来语、日语、葡萄牙语、俄语、塞尔维亚语、斯洛文尼亚语、西班牙语、台湾语、土耳其语和乌克兰语
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Why does this galaxy have such a long tail? In this stunning vista, based on image data from the Hubble Legacy Archive, distant galaxies form a dramatic backdrop for disrupted spiral galaxy Arp 188, the Tadpole Galaxy. The cosmic tadpole is a mere 420 million light-years distant toward the northern constellation of the Dragon (Draco). Its eye-catching tail is about 280 thousand light-years long and features massive, bright blue star clusters. One story goes that a more compact intruder galaxy crossed in front of Arp 188 - from right to left in this view - and was slung around behind the Tadpole by their gravitational attraction. During the close encounter, tidal forces drew out the spiral galaxy's stars, gas, and dust forming the spectacular tail. The intruder galaxy itself, estimated to lie about 300 thousand light-years behind the Tadpole, can be seen through foreground spiral arms at the upper right. Following its terrestrial namesake, the Tadpole Galaxy will likely lose its tail as it grows older, the tail's star clusters forming smaller satellites of the large spiral galaxy. APOD in world languages: Arabic (IG), Bulgarian, Catalan, Chinese (Beijing), Chinese (Taiwan), Czech, Dutch, Farsi, French, German, Hebrew, Japanese, Portuguese, Russian, Serbian, Slovenian, Spanish, Taiwanese, Turkish, and Ukrainian