朋友們！不好意思，今天有事發(fā)晚了，沒有搶到全國第一。明天再搶回來?。?！

話不多說，來看看APOD吧！

Arp 286：室女三重星系

This colorful telescopic field of view features a trio of interacting galaxies almost 90 million light-years away, toward the constellation Virgo. On the right two spiky, foreground Milky Way stars echo the extragalactic hues, a reminder that stars in our own galaxy are like those in distant island universes. With sweeping spiral arms and obscuring dust lanes, the dominant member of the trio, NGC 5566, is enormous, about 150,000 light-years across. Just above it lies smaller, bluish NGC 5569. Near center a third galaxy, NGC 5560, is apparently stretched and distorted by its interaction with massive NGC 5566. The trio is also included in Halton Arp’s 1966 Atlas of Peculiar Galaxies as Arp 286. Of course, such cosmic interactions are now appreciated as part of the evolution of galaxies.

這幅色彩繽紛的的望遠鏡視野，呈現(xiàn)室女座方向約9千萬光年遠處的3個互擾星系。影像右側(cè)的這2顆帶芒恒星，其色澤除了與這片河外景觀相互呼應(yīng)之外，也在提醒我們：銀河系內(nèi)的恒星也和這些遙遠宇宙島的恒星雷同。擁有寬廣螺旋臂和不透光塵埃帶、3個星系中最龐大的NGC 5566，是個寬達150,000光年的大星系。它上方的小星系為NGC 5569。而在影像的中央心附近，可見到色彩繽紛、因與大質(zhì)量NGC 5566交互作用而拉長變形的第三個星系NGC 5560。這個三重星系，在Halton Arp于1966年所編輯的特殊星系圖集的登錄號為Arp 286。這類的宇宙級交互作用，現(xiàn)在被認是星系演化的部分過程。