What’s more, the current story of the universe doesn’t predict nearly enough dark matter halos in the early universe as would be needed to build the many big galaxies that JWST saw.
In that light, things look pretty dire for scientists’ current theory of how the universe evolved.
But Muñoz and his colleagues think it’s too soon to tear up our current picture of how our universe evolved. Perhaps, they say, scientists simply need to be more careful as they interpret data from JWST.
Timeline of early galaxies
JWST has detected many galaxies from shortly after the universe’s birth (the Big Bang). A few are shown on this timeline. Some of these galaxies — called the “universe breakers” — appear to be more massive than theory can explain.
Hubble weighs in
Muñoz’s group decided to check JWST’s results using data from NASA’s Hubble Space Telescope. Hubble is older. And its “eyesight” isn’t as good. So it can’t see quite as far back in time as JWST can. But both instruments can capture light from galaxies in one era. That era spans roughly 450 million to 750 million years after the Big Bang. JWST views those galaxies in
NASA’s James Webb Space Telescope is raising big questions about the early universe.
In its first images, JWST captured what appeared to be huge galaxies in the ancient universe. In …read more
Source:: Science Explores
