Calculating the age of the universe involves measuring its current rate of expansion and tracing back in time. Understanding how the rate of expansion has evolved requires studying the material composition and energy density of the universe.
Valuable data about these factors is contained in the subtle temperature variations observed in the cosmic microwave background, which is the faint glow of light lingering from the Big Bang that fills the universe.
Recent studies utilizing the Lambda-CDM model of cosmology have estimated the age of the universe to be 13.79 billion years. However, conflicting research, like a 2013 study on the star HD 140283, suggests an older age of about 14.46 billion years.
The discovery of galaxies forming soon after the Big Bang challenges these age estimates.
Proposed solutions suggest new interpretations of redshifts in distant galaxies as a result of gradual energy loss over vast distances rather than pure motion. This reimagining can help explain the rapid evolution of ancient galaxies.
A different theory posits an older universe of around 26.7 billion years, but its lack of empirical evidence limits its acceptance.
This article addresses the question “How old is the universe really?” posed by Ana Castro.
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Source: www.sciencefocus.com
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