These stars may have been born only 250 million years after the Big Bang

MACS1149-JD1 galaxy
STAR START Scientists find evidence that stars formed in a faraway galaxy (indicated by the boxes) when the universe was just 250 million years old.

A measly 250 million years after the Big Bang, in a galaxy far, far away, what may be some of the first stars in the universe began to twinkle. If today’s 13.8-billion-year-old universe is in middle age, it would have been just starting to crawl when these stars were born.

Researchers used instruments at the Atacama Large Millimeter/submillimeter Array observatory in Chile to observe light emitted in a galaxy called MACS1149-JD1, one of the farthest light sources visible from Earth. The emissions are a clue to the galaxy’s redshift — a stretching of the wavelength of light that signifies the speed at…

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