By Jason Palmer Science and technology reporter, BBC News, Seattle
Galaxies making up the protocluster Circles show the galaxies making up the protocluster far in the background
Astronomers have revealed the most distant cluster of galaxies ever observed, caught at a never-before-seen stage of development.
Cosmos-Aztec3 has been described as a "metropolis in the making", because such clusters are believed to grow like cities, absorbing outlying villages.
It lies 12.6 billion light years away, and appears to be just tens or hundreds of millions of years old.
Galaxy clusters discovered to date have been billions of years further along.
By contrast, the light from the "protocluster" Cosmos-Aztec3 left when the Universe itself was just one billion years old. - BBC
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Topic: Galaxies making up the protocluster Circles (Read 558 times)