NASA 每日搬运 D55
How far is the farthest star we've ever seen? More than halfway across the universe, an enormous blue star nicknamed Icarus was spotted by the Hubble Space Telescope (@NASAHubble) through a quirk of nature that amplified the star's feeble glow. The star, harbored in a very distant spiral galaxy, is so far away that its light has taken 9 billion years to reach Earth. It appears to us as it did when the universe was about 30 percent of its current age.
我们见过的最远的恒星有多远？哈勃太空望远镜（@NASAHubble）发现了一颗绰号伊卡洛斯（Icarus）的巨大蓝星，这颗恒星远远超过了宇宙的一半，它通过奇特的自然现象加深了这颗恒星的微弱光芒。这颗恒星位于一个非常遥远的旋涡星系中，距离它的距离太远，以至于它的光线需要90亿年才能到达地球。在我们看来，当宇宙达到目前年龄的30％时，它就是这样。 This video shows a galaxy cluster located about 5 billion light-years from Earth. This massive cluster of galaxies sits between the Earth and the galaxy that contains the distant star. Thanks to a lucky alignment between the cluster, a dense object within it and a distant star, the image of the distant star was magnified by a factor of 2000, making it visible by the Hubble Space Telescope.
这部影片展示了距离地球约50亿光年的星系团。这个巨大的星系团位于地球与包含遥远恒星的星系之间。由于星团内部密集的物体和遥远的恒星之间幸运的对准，遥远恒星的图像被放大了2000倍，使其可以被哈勃太空望远镜看到。 Like the galaxy in which the star is located, the star is actually visible several times. However, the light from the second image of the star was redirected by another massive object in the cluster and only became visible when this object moved out of the line of sight. The video shows the position of the two images of the star within the cluster.
就像恒星所在的星系一样，恒星实际上可以看到几次。然而，恒星的第二幅图像发出的光线被另一个巨大的物体重新定向，只有当物体移出视线时才能看到。该视频显示星团内两颗星图像的位置。 Credit: @europeanspaceagency/Hubble, NASA #nasa #space #hubble #spothubble #spacetelescope#telescope #galaxy #cluster #star #universe #solarsystem#lightyears #billions #visible #beautiful #earth #video#science