Astronomers see this cloud just 1.8 billion years after the Big Bang. It has a tiny percentage of heavy elements, those forged in subsequent generations of stars.
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Astronomers see this cloud just 1.8 billion years after the Big Bang. It has a tiny percentage of heavy elements, those forged in subsequent generations of stars.
from EarthSky » Space http://ift.tt/1Rnpx2K
via IFTTT
Telescopically 