JADES-GS-z14-0: 最遥远天体的新记录

2024年6月24日

JADES-GS-z14-0: A New Farthest Object
Image Credit: NASA, ESA, CSA, STScI, B. Robertson (UC Santa Cruz), B. Johnson (CfA), S. Tacchella (Cambridge), P. Cargile (CfA)

Explanation: But what did galaxies look like back then? These questions took a step forward recently with the release of the analysis of a James Webb Space Telescope (JWST) image that included the most distant object yet discovered. Most galaxies formed at about 3 billion years after the Big Bang, but some formed earlier. Pictured in the inset box is JADES–GS-z14-0, a faint smudge of a galaxy that formed only 300 million years after the universe started. In technical terms, this galaxy lies at the record redshift of z=14.32, and so existed when the universe was only one fiftieth of the its present age. Practically all of the objects in the featured photograph are galaxies.

Tomorrow’s picture: space thingy

JADES-GS-z14-0: 最遥远天体的新记录
影像提供: NASA, ESA, CSA, STScI, B. Robertson (UC Santa Cruz), B. Johnson (CfA), S. Tacchella (Cambridge), P. Cargile (CfA)

说明: 如果我们能看到宇宙起源之初，会看到什么？我们可以看到星系正在形成。不过，那时的星系长什么模样？最近随着内有现知最遥远天体的韦伯太空望远镜（JWST）影像的分析结果之发布，这些提问的答案有新的进展。大多数星系形成于大爆炸后约30亿年，但有些星系形成的年代更早。这幅影像嵌图里的JADES–GS-z14-0 ，就是一个形成于宇宙起源后仅3亿年的昏暗模糊星系。以专业术语来说，这个星系位于创红移新记录的z=14.32之处，也就是说，它存在时，宇宙的年龄只有目前的50分之1。在这幅主题照片里，几乎所有的天体都是星系。