作者：全景再现科技 标题：螺旋星云

简介： The Helix Nebula。This colour-composite image of the Helix Nebula (NGC 7293) was created from images obtained using the Wide Field Imager (WFI), an astronomical camera attached to the 2.2-metre Max-Planck Society/ESO telescope at the La Silla observatory in Chile. The blue-green glow in the centre of the Helix comes from oxygen atoms shining under effects of the intense ultraviolet radiation of the 120 000 degree Celsius central star and the hot gas. Further out from the star and beyond the ring of knots, the red colour from hydrogen and nitrogen is more prominent. A careful look at the central part of this object reveals not only the knots, but also many remote galaxies seen right through the thinly spread glowing gas.This image was created from images through blue, green and red filters and the total exposure times were 12 minutes, 9 minutes and 7 minutes respectively. This image is available as a mounted image in the ESOshop. 这张螺旋星云（NGC 7293）的彩色合成图像是由宽视场成像仪（WFI）获得的图像创建的，WFI是一台天文相机，安装在智利拉西拉天文台2.2米的马克斯·普朗克学会/ESO望远镜上。螺旋中心的蓝绿色辉光来自于氧原子在12万摄氏度中心恒星的强烈紫外线辐射和高温气体的作用下发出的光芒。在离恒星更远的地方，在结环之外，氢和氮的红色更为突出。仔细观察这颗天体的中心部分，不仅可以发现这些结，还可以通过稀薄的炽热气体看到许多遥远的星系。该图像是通过蓝色、绿色和红色滤镜从图像创建的，总曝光时间分别为12分钟、9分钟和7分钟。此映像在ESOshop中作为挂载映像提供