Six massive candidate galaxies seen about 500 million years after the big bang by the JWST defy expectations. Too big and too soon, these outliers during the early age of the universe provided a new mystery about the cosmic age problem waiting to be solved.

Sizes and mass profiles of candidate massive galaxies discovered by JWST
https://arxiv.org/pdf/2305.17162.pdf

Scientists untangle mystery about the universe's earliest galaxies
https://www.reuters.com/science/scien...

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