Overview

• Rajendra Gupta of the University of Ottawa published the work in Galaxies on September 12, with a media release on October 2 summarizing the claims.
• The CCC+TL framework introduces a parameter α that is fit as constant on cosmological scales but varies within galaxies to reproduce flat rotation curves without dark matter halos.
• The model attributes apparent cosmic acceleration to an average weakening of nature’s forces as the universe expands rather than to dark energy.
• Gupta reports fits to rotation curves for seven galaxies and describes a threshold “turn-off density” where α’s effects grow as visible matter thins, with plans to test lensing and cluster dynamics next.
• Experts note the proposal challenges the ΛCDM consensus and requires independent checks against lensing, CMB, galaxy clustering, supernova data, and stringent constraints on any variation in fundamental constants.