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Study Confirms Accelerating Expansion, Dark Energy Still 70%

6/23/2026

Summary

Story summary

Phil Wiseman of the University of Southampton announced that the universe’s expansion continues to accelerate, overturning a November 2025 study that claimed dark energy was weakening due to mis-matched white-dwarf and host-galaxy ages.
The team confirmed Type Ia supernova brightness measurements were correct and that dark energy accounts for roughly 70 % of the universe’s matter and energy, averting the alleged crisis.
Researchers said attention can return to probing what dark energy is.

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Story summary

Phil Wiseman of the University of Southampton announced that the universe’s expansion continues to accelerate, overturning a November 2025 study that claimed dark energy was weakening due to mis-matched white-dwarf and host-galaxy ages.
The team confirmed Type Ia supernova brightness measurements were correct and that dark energy accounts for roughly 70 % of the universe’s matter and energy, averting the alleged crisis.
Researchers said attention can return to probing what dark energy is.