A new study led by Prof. Young-Wook Lee from Yonsei University challenges the theory that the universe’s expansion is accelerating, suggesting it may actually be slowing down as dark energy diminishes. This research, which examines the properties of distant supernovae, indicates that the universe has entered a phase of decelerated expansion and could potentially end in a “big crunch” if dark energy continues to weaken. The findings, published in the Monthly Notices of the Royal Astronomical Society, could signify a major shift in cosmology.
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