A massive survey of the cosmos is revealing new details of one of the most mysterious facets of the universe, dark energy. Intriguingly, when combined with other observations, the data hint that dark energy, commonly thought to maintain a constant density over time, might evolve along with the cosmos.
The result is “an adrenaline shot to the cosmology community,” says physicist Daniel Scolnic of Duke University, who was not involved with the new study.
Dark energy, an invisible enigma that causes the universe’s expansion to speed up over time, is poorly understood, despite making up the bulk of the universe’s contents. To explore that puzzle, the Dark Energy Spectroscopic
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