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N63A: Supernova Remnant in Visible and X-ray Explanation: What has this supernova left behind? As little as 2,000 years ago, light from a massive stellar explosion in the Large Magellanic Cloud (LMC) first reached planet Earth. The LMC is a close galactic neighbor of our Milky Way Galaxy and the rampaging explosion front is now seen moving out - destroying or displacing ambient gas clouds while leaving behind relatively dense knots of gas and dust. What remains is one of the largest supernova remnants in the LMC: N63A. Many of the surviving dense knotshave been themselves compressed and may further contract to form new stars. Some of the resulting stars may then explode in a supernova, continuing the cycle. Featured here is a combined image of N63A in the X-ray from the Chandra Space Telescope and in visible light by Hubble. The prominent knot of gas and dust on the upper right -- informally dubbed the Firefox -- is very bright in visible light, while the larger supernova remnant shines most brightly in X-rays. N63A spans over 25 light years and lies about 150,000 light years away toward the southern constellation of Dorado. N63A：可见光和X射线下的超新星遗迹 这个超新星遗留下了些什么？大约2000年以前，大麦哲伦星系（LMC）中的一颗大质量恒星爆炸所产生的光首次到达地球。LMC是我们银河系的近邻，我们可以看到狂暴的爆炸前缘正在向外扩张，摧毁了周围的气体云，同时留下了由气体和尘埃组成的相对致密结构。而遗留下的LMC中最大的超新星遗迹就是N63A。很多残存的致密结构在经过自身压缩后，可能进一步塌缩形成新的恒星。其中一些恒星也可能随后会发生超新星爆炸，重复这个过程。这幅N63A的照片是由钱德拉太空望远镜和哈勃太空望远镜分别在X射线和可见光下拍摄的照片组合而成。图像右上方的由气体和尘埃组成的显著结构被俗称为“火狐”，在可见光下非常明亮，而较大的超新星遗迹在x射线下最为明亮。N63A的跨度超过25光年，它位于剑鱼座方向，距离地球约15万光年远。 高清原图地址： https://apod./apod/image/1912/N63A_HubbleChandraSchmidt_1019.jpg 近期文章： Astronomy Picture of the Day——巴西上空的星链卫星 Astronomy Picture of the Day——双子座流星雨及其朋友们 Astronomy Picture of the Day——从空中看曼尼古根撞击陨石坑 NASA 微店 |
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