Gupta Model Puts Universe at 26.7 Billion Years, Easing JWST Early-Galaxy Tension
Updated
Updated · The Brighter Side of News · May 12
Gupta Model Puts Universe at 26.7 Billion Years, Easing JWST Early-Galaxy Tension
3 articles · Updated · The Brighter Side of News · May 12
26.7 billion years is the age Rajendra Gupta’s new cosmology assigns to the universe, roughly doubling the standard 13.7 billion-year estimate and recasting how JWST’s earliest galaxies are interpreted.
Pantheon+ supernova data are the main test bed: Gupta says a hybrid model combining cosmic expansion, “tired light,” and changing fundamental constants fits nearly as well as Lambda-CDM, while plain tired light fails.
At redshift 10, the model gives the universe 5.8 billion years old, versus a far younger cosmos in standard cosmology, and it boosts inferred galaxy sizes by factors up to 12.8 at redshift 20.
Those changes could make JWST’s bright, massive and compact galaxies less anomalous, but Gupta says the model still must clear major tests from the cosmic microwave background, big-bang nucleosynthesis and baryonic acoustic oscillations.
The proposal adds to broader pressure on standard cosmology after recent reports of possible deviations from the long-used FLRW framework, though Gupta’s paper remains a contested, early-stage alternative.
If the cosmos is 'lumpier' than assumed, was the early universe's perfect smoothness just an illusion?
Is cosmic acceleration an illusion, simply caused by our vantage point within a non-uniform universe?
Is the Universe Really Uniform? Recent 2–4 Sigma Deviations from FLRW and Their Impact on Cosmology
Overview
Recent cosmological research has uncovered evidence that the universe may not be as uniformly smooth as the standard FLRW model suggests. Discrepancies of 2 to 4 sigma have been observed across multiple datasets and analytical methods, indicating that our understanding of the universe’s large-scale structure might need refinement. To investigate these deviations, scientists are using advanced techniques like symbolic regression and combining data from supernovae, galaxy surveys, and baryon acoustic oscillations. This flexible, model-independent approach allows for a more comprehensive reconstruction of cosmic expansion, offering significant improvements over traditional analyses and potentially reshaping our view of the cosmos.