In the primordial darkness, after the Big Bang, nothing drifted but a vast sea of hydrogen and helium. It wasn't until stars came along, born from crushing densities in that clumping gas, that heavier ...
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We May Have Finally Laid Eyes on The Universe's Very First StarsThe researchers focused their efforts on galaxies with powerful hydrogen and helium emission spectra, and little evidence of other elements. Their pipeline yielded two candidates.
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