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Looking for signs of the first stars

It may soon be possible to detect the universe's first stars by looking for the blue colour they emit on explosion. The Universe was dark and filled with hydrogen and helium for 100 million years following the Big Bang.  Then, the first stars appeared, and metals were created by thermonuclear fusion reactions  within stars [Credit: Copyright Kavli IPMU]The universe was dark and filled with hydrogen and helium for 100 million...

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Looking for signs of the first stars

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