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Research Suggests Universe Has 20 Billion Years Left

10/6/2025

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Summary

Story summary

The universe may have a finite lifespan of about 33 billion years, with roughly 20 billion remaining.
Researchers propose a model with dark energy and an axion, implying a negative cosmological constant and eventual expansion halt.
Dark Energy Survey (DES) and Dark Energy Spectroscopic Instrument (DESI) data hint evolving dark energy, underscoring the cosmological constant's sign for the universe's fate.

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Story summary

The universe may have a finite lifespan of about 33 billion years, with roughly 20 billion remaining.
Researchers propose a model with dark energy and an axion, implying a negative cosmological constant and eventual expansion halt.
Dark Energy Survey (DES) and Dark Energy Spectroscopic Instrument (DESI) data hint evolving dark energy, underscoring the cosmological constant's sign for the universe's fate.