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Most distant massive galaxy cluster identified

The early universe was a chaotic mess of gas and matter that only began to coalesce into distinct galaxies hundreds of millions of years after the Big Bang. It would take several billion more years for such galaxies to assemble into massive galaxy clusters — or so scientists had thought. Now astronomers have detected a massive, sprawling, churning galaxy cluster that formed only 3.8 billion years after the Big Bang, some 10 billion light years from Earth.

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Peeking into our galaxy’s stellar nursery

Astronomers have long turned their telescopes to the wide swaths of interstellar medium to get a look at the formation and birth of stars. A team of international researchers has just released the most comprehensive images anyone has ever seen of the Milky Way’s cold interstellar gas clouds where new stars and solar systems are being born.