Could Dark Energy Change Over Time? Searching for Answers Through Computer Simulations
2025.10.02
Research
Dark energy, which drives the accelerated expansion of the Universe, is assumed to be constant since the Universe began by today’s leading model. Researchers from Japan, Spain, and the U.S. explored the possibility of time-varying dark energy by conducting one of the largest cosmological simulations to date. Their results show that while dark energy variations have modest effects alone, variations in other parameters like matter density significantly alter galaxy formation and cosmic structure, aligning closely with the latest observations.
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Dark energy is responsible for the expansion of the Universe, but its true nature is still a subject of much debate. Computer simulations based on the latest astronomical data enable scientists to understand the effects of different values and behaviors of the dark energy parameter. This image shows the time evolution of dark matter structures revealed by one of the largest computational simulations, Uchuu, which is based on the standard cosmological model. The evolution is shown in the clockwise direction from the top-left panel.