Dark energy debunked? Cosmic acceleration may be an illusion
Researchers from the Tata Institute of Fundamental Research and Oxford University are challenging the theory of dark energy, suggesting that cosmic acceleration might be an observational illusion. Their analysis of Type Ia supernovae data suggests that star age may influence brightness measurements, though the scientific community remains divided.
Why it matters
This study questions a cornerstone of modern cosmology, potentially requiring a fundamental rethink of how we understand the expansion and composition of the universe.
A new analysis led by researchers at the Tata Institute of Fundamental Research, Mumbai, together with Professor Subir Sarkar of the University of Oxford, is challenging one of the central ideas in modern cosmology: that the universe is expanding at an accelerating rate because of "dark energy" associated with the quantum vacuum.
Their letter, published in Monthly Notices of the Royal Astronomical Society , argues that the evidence for cosmic acceleration may not be as strong as widely assumed. The conclusion is disputed. In the same issue of the journal, a separate paper co-authored by Professor Maria Vincenzi, also at the University of Oxford, concludes that observations continue to support an accelerating universe.
Get smarter about the news
Sign up free for a feed built around what you actually care about, Dive Deeper research on any story, and the full text of every article.
Create free accountAlready have an account? Sign in