JADES-GS-z14-0：一个新的最远天体
(原标题: JADES-GS-z14-0: A New Farthest Object)
2024-06-24
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如果我们能看到宇宙的起源呢？我们可以看到星系的形成。但那时的星系是什么样子的呢？最近，对詹姆斯·韦伯太空望远镜（JWST）的一幅图像进行了分析，发现了迄今为止发现的最遥远的天体，这些问题向前迈进了一步。大多数星系形成于宇宙大爆炸后大约30亿年，但有些形成得更早。插图中的图片是JADES-GS-z14-0，这是一个在宇宙开始后仅3亿年形成的星系的模糊斑点。用专业术语来说，这个星系的红移值为z=14.32，因此当宇宙只有现在年龄的五十分之一时就存在了。这张特写照片中几乎所有的物体都是星系。
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What if we could see back to the beginning of the universe? We could see galaxies forming. 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.