Dark Energy Survey Sheds New Light on Universe's Expansion

Findings suggest dark energy density may vary over time, challenging standard cosmological model.

The Dark Energy Survey (DES) has released results from an extensive analysis of supernovae, providing new insights into the expansion of the universe and the nature of dark energy.
The DES results are consistent with the standard cosmological model of a universe with accelerated expansion, but do not definitively rule out a more complex model.
The DES used advanced AI techniques and data from about 1,500 type Ia supernovae to make their findings, marking a significant advancement from the 52 supernovae used in the original 1998 discovery of the universe's accelerating expansion.
The density of dark energy in the universe is believed to be constant according to the standard cosmological model, represented by the parameter w equaling -1. However, the DES results found w to be -0.80, suggesting the possibility that dark energy may vary over time.
Further data and research will be needed to come to a definitive conclusion, with upcoming projects like the Vera C. Rubin Observatory expected to contribute to this effort.