In July 2023, a study published in the Monthly Notices of the Royal Astronomical Society journal put the age of the Universe as 26.7 billion years. The author Rajendra Gupta shows a new model that stretches the galaxy formation time by several billion years, leading to the conclusion that the age of the universe is roughly twice as long as thought. Using Zwicky 's tired light theory and "coupling constants" as described by Paul Dirac, Gupta writes that the recent James Webb Space Telescope observations are in strong tension with existing cosmological models. Gupta says about his new theory: "It thus resolves the 'impossible early galaxy' problem without requiring the existence of primordial black hole seeds or modified power spectrum."