James Webb Reveals 13.5-Billion-Year-Old Galaxies, Finding 100 Times More Bright Objects Than Models Predicted
Updated
Updated · spacedaily.com · Jul 29
James Webb Reveals 13.5-Billion-Year-Old Galaxies, Finding 100 Times More Bright Objects Than Models Predicted
3 articles · Updated · spacedaily.com · Jul 29
Summary
Webb has confirmed galaxy MoM-z14 from about 13.5 billion years ago, pushing views back to less than 300 million years after the Big Bang.
Infrared instruments make that possible because cosmic expansion redshifts early galaxy light beyond visible wavelengths, turning extreme distance into a view of the deep past.
MoM-z14 and similar objects are brighter and more chemically enriched than expected, with one survey finding more than 100 times as many bright galaxies at comparable redshifts as pre-Webb models predicted.
Webb’s 6.5-meter mirror gives it more than six times Hubble’s light-collecting area and lets it detect objects up to 100 times fainter, opening direct observations of Cosmic Dawn—about 50 million to 1 billion years after the Big Bang.