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Physicists Predict Universe Has 20 Billion Years Left

10/27/2025

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Summary

Story summary

Physicists including Henry Tye of Cornell University estimate the universe's lifespan at about 33 billion years, with roughly 20 billion remaining.
The study, published in the Journal of Cosmology and Astroparticle Physics, suggests the cosmological constant may be negative.
New data from dark energy observatories inform the analysis, including axions that initially push expansion outward but weaken over time.

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Story summary

Physicists including Henry Tye of Cornell University estimate the universe's lifespan at about 33 billion years, with roughly 20 billion remaining.
The study, published in the Journal of Cosmology and Astroparticle Physics, suggests the cosmological constant may be negative.
New data from dark energy observatories inform the analysis, including axions that initially push expansion outward but weaken over time.