Recent JWST Studies Support Our Prediction of no Type Ia Supernovae in Early Universe with Redshift Greater than or Equal to 4

Constraints support 13.8 Gyr beginning of Universe

A portion of the JADES Deep Field, produced by the JWST and released last month (June 2025) contains many supernovae that exploded when the universe was less than 2 billion years old. It includes the farthest supernova ever spectroscopically confirmed at a redshift of 3.6. Its progenitor star exploded when the universe was only 1.8 billion years old, a conclusion consistent with our prediction that no Type Ia supernovae will be found in galaxies with a redshift greater than or equal to 4. Image credit: NASA, ESA, CSA, STScI, JADES Collaboration.