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LiveScience
LiveScience
Ben Turner

James Webb telescope finds ancient galaxy larger than our Milky Way, and it's threatening to upend cosmology

James Webb James Webb Telescope Milky way
JWST-7329: a rare massive galaxy that formed very early in the Universe.

The James Webb Space Telescope (JWST) has found a galaxy in the early universe that's so massive, it shouldn't exist, posing a "significant challenge" to the standard model of cosmology, according to the study authors.

The galaxy, called ZF-UDS-7329, contains more stars than the Milky Way, despite having formed only 800 million years into the universe's 13.8 billion-year life span. This means they were somehow born without dark matter seeding their formation, contrary to what the standard model of galaxy formation suggests.

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