According to data from JWST, ZF-UDS-7329 dates to approximately 11.5 billion years ago (3.2 cosmic redshift). Examining the spectra of light from the stars of this extremely distant galaxy, researchers found that the stars were born 1.5 billion years before the galaxy itself, roughly 13 billion years ago.
Galaxy that defies scientific models
The galaxy called ZF-UDS-7329 Just 800 million years after the Big Bang It is stated that it has started to form and contains more stars than the Milky Way. Astronomers say the first galaxies were giant dark matter Although it is assumed that the halos are formed around it, the newly discovered galaxy indicates that the opposite of this assumption is true.
Current theoriessuggests that halos of dark matter (a mysterious and invisible substance believed to make up about 25% of the current universe) combined with gas, triggering the formation of the first galaxies. However, according to these theories, galaxies similar to ours should have emerged after the universe’s life span of 1 billion to 2 billion years. The ancient galaxy named ZF-UDS-7329 refutes this view.
Because the newly discovered galaxy grown and matured without accumulation of dark matter ve stopped forming new stars. JWST has previously discovered stars and galaxies that should not have existed in the early stages of the universe. The emergence of similar studies and results raises the question: How did these galaxies form so quickly in the very early universe, and why did they suddenly stop forming stars? Researchers say they will try to make sense of this unusual event by looking for more galaxies like this.
Source
https://www.space.com/ancient-galaxy-upending-cosmology
https://www.swinburne.edu.au/news/2024/02/beyond-whats-possible-new-jwst-observations-unearth-mysterious-ancient-galaxies/
https://www.nature.com/articles/s41586-024-07191-9
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