New model may explain ‘cosmic glitch,’ where gravity weakens at edge of universe, scientists say

NEW DELHI: A groundbreaking study suggests that a new model could shed light on the perplexing “cosmic glitch” observed at the edge of the expanding universe, where gravity appears to weaken by approximately one per cent.
The cornerstone of modern physics, Einstein‘s theory of general relativity, has long provided a robust framework for understanding gravity. However, when applied to cosmic scales, inconsistencies arise, challenging our understanding of the universe’s dynamics.
Robin Wen, a graduate in mathematical physics at the University of Waterloo, Canada, elucidated, “While Einstein’s theory has been instrumental in various astronomical phenomena, including elucidating the Big Bang and capturing images of black holes, discrepancies emerge when grappling with gravity on a cosmic canvas.”
A century ago, astronomers unveiled the universe’s expansion, with some positing that the weakening of gravity at its extremities could be the driving force behind this phenomenon.
Professor Niayesh Afshordi, an astrophysics expert at the University of Waterloo, elaborated, “As galaxies recede into the distance, they accelerate, seemingly defying the boundaries set by Einstein’s theory. Our findings suggest a departure from the expected gravitational behavior, particularly at immense distances, akin to a ‘cosmic glitch.'”
Lead author Wen, discussing the study published in the Journal of Cosmology and Astroparticle Physics, remarked, “For over two decades, scientists have grappled with reconciling the discrepancies within the framework of general relativity.”
The newly proposed mathematical model, hailed as a “footnote to Einstein’s theory” by Wen, offers a promising avenue for addressing these anomalies. By refining and extending Einstein’s equations, the model aims to elucidate the observed deviation without undermining the theory’s established validity.
“When traversing cosmic distances, it appears that additional considerations come into play,” noted Wen.
Afshordi emphasized, “This novel model could mark the initial step in unraveling a cosmic enigma transcending space and time, offering fresh insights into the universe’s expansive tapestry.”
The pursuit of understanding gravity on a cosmic scale continues to fuel scientific inquiry, with researchers poised to unravel the mysteries lurking at the universe’s furthest reaches.
(With inputs from agencies)

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