this post was submitted on 21 Mar 2025
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Dark energy is weakening and the universe could (eventually) collapse, study says (www.npr.org)
submitted 1 month ago by Delta_V@lemmy.world to c/space@lemmy.world
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...Scientists have believed dark energy was a "cosmological constant," but it is actually changing over time in unexpected ways...current data shows that, at the beginning of the universe, dark energy was very strong. But it has weakened with time and will continue to do so...The new research builds on data released from DESI in April 2024 that found signs that dark energy was changing. DESI has been surveying the universe for four years and an analysis of five years' worth of data is next for its research

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[โ€“] mumblerfish@lemmy.world 3 points 1 month ago

Found signs

Is this a "best fit" sort of result or an actual significant measurement on the equation of state?

String theorists have conjectured that the exclusion of a (positive) cosmological constant explanation for dark energy is a prediction of string theory. If this result holds up, that line of research seems quite interesting.