欧几里得太空望远镜的英仙座星系团

2023年11月8日

Perseus Galaxy Cluster from Euclid
Image Credit & License: ESA, Euclid, Euclid Consortium, NASA; Processing: Jean-Charles Cuillandre (CEA Paris-Saclay) & Giovanni Anselmi; Text: Jean-Charles Cuillandre

Explanation: There’s a new space telescope in the sky: Euclid. Equipped with two large panoramic cameras, Euclid captures light from the visible to the near-infrared. It took five hours of observing for Euclid’s 1.2-meter diameter primary mirror to capture, through its sharp optics, the 1000+ galaxies in the Perseus cluster, which lies 250 million light years away. More than 100,000 galaxies are visible in the background, some as far away as 10 billion light years. The revolutionary nature of Euclid lies in the combination of its wide field of view (twice the area of the full moon), its high angular resolution (thanks to its 620 Megapixel camera), and its infrared vision, which captures both images and spectra. Euclid’s initial surveys, covering a third of the sky and recording over 2 billion galaxies, will enable a study of how dark matter and dark energy have shaped our universe.

Tomorrow’s picture: M1

欧几里得太空望远镜的英仙座星系团
影像提供与授权: ESA, Euclid, Euclid Consortium, NASA; 影像处理: Jean-Charles Cuillandre (CEA Paris-Saclay) & Giovanni Anselmi; 文稿: Jean-Charles Cuillandre

说明: 天空新增了一部名为欧几里得（Euclid）的太空望远镜。欧几里得配备了两部大型的全景相机，用以捕捉从可见光到近红外光的讯息。拥有直径1.2米主镜的欧几里得望远镜，通过锐利的光学系统进行5个小时的持续观测，才拍下了这幅呈现2.5亿光年外英仙座星系团里的1,000多个星系之影像。此外，这张影像还记录了10多万个背景星系，有些甚至远在100亿光年之外。欧几里得望远镜的创新性，在于它超过2倍满月面积的宽视场、其6.2亿像素相机所带来的高角度解析率、以及它的红外光视力，更难得的是能同时取得影像和光谱资讯。欧几里得望远镜初步计划要勘测3分之1的天空，并记录超过20亿个星系，以进行暗物质和暗能量是如何塑造我们宇宙的研究。

明日的图片: M1