First Stars Fired Up 140 Million Years Later Than Previously Thought

February 5, 2015 10:10 PM

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It turns out that the "let there be light" moment in the early universe occurred much later than scientists previously thought, according to a newly published analysis of data collected from the European Space Agency's Planck telescope.

The time of the first stars, referred to by astronomers and cosmologists as the "reionization" epoch, is now thought to have occurred about 140 million years later than previously thought, or about 560 million years after the Big Bang, an event that formed our universe 13.8 billion years ago.

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