Large spiral galaxies like the Milky Way are expected to take several billion ... seen at a redshift of 5.2—just 1 billion years after the Big Bang. Despite this early epoch, the galaxy exhibits ...

And very similar to the Milky Way, Zhulong shows a central thickening of older stars, surrounded by a flat disc with spiral arms in which new stars are being formed. According to Mengyuan Xiao ...