A portion of the new JWST deep-field image, shown with the Hubble observations as its counterpart. Within the JWST field are a significant number of objects not seen by Hubble, showcasing JWST’s ability to reveal what Hubble could not, thanks predominantly to its longer-wavelength capabilities. Whether the newly revealed ultra-distant galaxies truly present a problem for our standard picture of cosmology remains to be determined. (Credit: NASA, ESA, CSA, STScI, Christina Williams (NSF’s NOIRLab), Sandro Tacchella (Cambridge), Michael Maseda (UW-Madison); Processing: Joseph DePasquale (STScI); Animation: E. Siegel)

Ask Ethan: Do JWST’s results contradict the Big Bang?

JWST has brought us more distant views of the early Universe than ever before. Is the Big Bang, and all of modern cosmology, in trouble?

Published in

Starts With A Bang!

10 min readApr 28, 2023

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When it comes to the science of cosmology — the history of the Universe and how it came to be the way it is today — one of the crowning…

Ethan Siegel

Written by Ethan Siegel

Editor for

Starts With A Bang!

The Universe is: Expanding, cooling, and dark. It starts with a bang! #Cosmology Science writer, astrophysicist, science communicator & NASA columnist.

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