Is Dark Energy Weakening? 2087 'Vampire' Stars Offer New Clues

A study using 2,087 Type Ia supernovae ('vampire' stars) provides new evidence that dark energy, the mysterious force accelerating the universe's expansion, is weakening. This contradicts the standard cosmological model, which predicts dark energy should remain constant. Using a supernova dataset called Union3, the study corroborates, through two independent lines of investigation, that dark energy may be weakening over time, which would have implications for the ultimate fate of the universe. Future data from the Vera C. Rubin Observatory will further test this finding.