New Research Suggests Dark Energy Is Evolving, Challenging Cosmology Models

Fresh DESI data suggests dark energy may evolve over time, contradicting long-standing cosmic expansion theories.

Written by Gadgets 360 Staff | Updated: 26 March 2025 22:30 IST

New Research Suggests Dark Energy Is Evolving, Challenging Cosmology Models

Photo Credit: DESI Collaboration /DOE /KPNO /NOIRLab /NSF /AURA /C. Lamman

The DESI data maps celestial objects, revealing the Universe's large-scale structure.

Highlights

DESI’s 3D map suggests dark energy may not be constant over time
Findings challenge the standard model of cosmology and cosmic expansion
Scientists await more data to understand dark energy’s true nature

A new research points out that dark energy may not be behaving as previously believed. Observations from a large-scale 3D map indicate that this force could be evolving over time, which contradicts the long-standing models of cosmology, the report highlights. Moreover, the researchers revealed that the conclusion was derived from the extensive observations of millions of galaxies. Scientists are now questioning whether the standard model, which is centred around a constant dark energy force, remains valid point in explaining the cosmos.

As per the latest report released by the Dark Energy Spectroscopic Instrument (DESI), the dark energy may not be a fixed force. The report highlights that the analysis was based on the data collected over three years, which covered nearly 15 million galaxies and quasars. The report further highlights that the DESI's ability to capture light from 5,000 galaxies allowed the researchers to examine large-scale cosmic structures. It even helped them to measure how the universe's expansion rate has changed over time.

Comparisons with Other Cosmic Observations

The study revealed that the inconsistencies arose when DESI's findings were compared with measurements from the cosmic microwave background (CMB) and type Ia supernovae. As for those who are not aware, the CMB consists of fossil light from the early universe and has been used to track the expansion history of the cosmos for a long time. Similarly, type Ia supernovae (often called standard candles for their uniform brightness) have provided key distance measurements. The DESI data suggests that dark energy's influence may have weakened over time, a deviation from the accepted cosmological model that assumes it remains unchanged.

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As per the official press release from DESI, scientist Arjun Dey stated that these findings could redefine humanity's understanding of the universe. The instrument's ongoing observations will continue to refine knowledge of dark energy's role.

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