They just discovered a surprising and very cool formation of galaxies.  And they are almost 10 billion light years away:

A multinational group of astronomers has discovered a distant cluster of galaxies with active star formation occurring in close proximity to the cluster’s central galaxy. The discovery is the first to show that galaxies at the cores of massive clusters can grow significantly by feeding off gas stolen from other galaxies.

The galaxy cluster in question, named SpARCS104922.6+564032.5 (SpARCS1049+56), contains at least 27 galaxies and has a total mass equal to about 400 trillion Suns.

Let’s find out more about these mysterious galaxies on page 2

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