Copyright:Stephen Leshin
原文:
Pointy stars and peculiar galaxies span this cosmic snapshot, a telescopic view toward the well-groomed constellation Coma Berenices. Bright enough to show off diffraction spikes, the stars are in the foreground of the scene, well within our own Milky Way. But the two prominent galaxies lie far beyond our own, some 41 million light-years distant. Also known as NGC 4747, the smaller distorted galaxy at left is the 159th entry in the Arp Atlas of Peculiar Galaxies, with extensive tidal tails indicative of strong gravitational interactions in its past. At about a 100,000 light-years across, its likely companion on the right is the much larger NGC 4725. At first glance NGC 4725 appears to be a normal spiral galaxy, its central region dominated by the yellowish light of cool, older stars giving way to younger hot blue star clusters along dusty spiral outskirts. Still, NGC 4725 does look a little odd with only one main spiral arm.
中文翻譯:
在這幅宇宙快照中，尖尖的星星和奇特的星系構成了美麗的天體畫面，這是透過望遠鏡觀測到的，朝向修整整齊的星座「Coma Berenices」。這些星星足夠明亮，能顯示出衍射尖峰，位於前景之中，隸屬於我們自己的銀河系。然而，兩個顯著的星系則位於我們的銀河系之外，約4100萬光年遠。
較小的變形星系（左側）也被稱為「NGC 4747」， 是「Arp Atlas of Peculiar Galaxies」中的第159個條目，擁有大量潮汐尾巴，顯示其過去經歷了強烈的引力互動。該星系的大小約為10萬光年，而位於右側的伴星系則是更大的「NGC 4725」。乍一看，「NGC 4725」似乎是一個正常的螺旋星系，其中央區域由黃ish色的冷卻老星主導，向外延伸的塵埃螺旋邊緣則是年輕的熱藍星團。不過，「NGC 4725」的確有一點奇怪，因為它只有一條主要的螺旋臂。
#宇宙觀察 #ComaBerenices #NGC4747 #NGC4725 #星系 #天文學 #銀河系 #宇宙之美 #太空探索
來源:NASA每日圖片
