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No, the Big Bang theory is not 'broken.' Here's how we know. - Space.com

No, the Big Bang theory is not 'broken.' Here's how we know. - Space.com

No, the Big Bang theory is not 'broken.' Here's how we know. - Space.com
Jan 30, 2023 1 min, 0 secs

But amid the breathtaking images and unprecedented findings, there was a puzzling claim: that the telescope had detected galaxies in the incredibly young universe.

Recently, researchers took a more careful look at the data and determined that the distant galaxies discovered by the James Webb Space Telescope are, indeed, perfectly compatible with our modern understanding of cosmology.

To accurately judge if the Big Bang is in trouble, a new team of researchers used Webb to identify galaxies with a much more precise and reliable method of determining distance, known as spectroscopic redshift.

Accounting for all these interactions requires the use of supercomputer simulations that take the raw, primal state of the universe as it was billions of years ago and follow the laws of physics to build artificial galaxies.

That's the only way to connect what we see in the real world (galaxies) with the fundamental parameters of the ΛCDM model (like the amount of normal and dark matter in the cosmos).

The appearance of galaxies with 10^8 solar masses in the early universe was no sweat for ΛCDM, the team explained in their research paper, which has been submitted to The Astrophysical Journal Letters and is available as a preprint via arXiv.

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