Story perspectives

New Method Reveals Universe Expanding Faster Than Expected

2/26/2026

Summary

Researchers Uncover Expansion

Researchers from the University of Illinois Urbana-Champaign and the University of Chicago developed the stochastic siren method to measure the Hubble Constant.
The method analyzes the faint gravitational-wave background from countless black hole mergers to provide independent measurements.
The absence of a detectable gravitational-wave background suggests the Universe is expanding faster than previously thought.
As detectors improve, this method may yield more precise measurements in the coming years.

History

Historical Context

Edwin Hubble's 1929 discovery of Hubble's Law established that galaxies recede from Earth, indicating an expanding universe. This foundational work built on earlier findings by Vesto Slipher and Georges Lemaître, who proposed the relationship between distance and recessional velocity. Recent advancements, such as the stochastic siren method, aim to refine measurements of the Hubble Constant, crucial for understanding cosmic evolution.

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Researchers Uncover Expansion

Researchers from the University of Illinois Urbana-Champaign and the University of Chicago developed the stochastic siren method to measure the Hubble Constant.
The method analyzes the faint gravitational-wave background from countless black hole mergers to provide independent measurements.
The absence of a detectable gravitational-wave background suggests the Universe is expanding faster than previously thought.
As detectors improve, this method may yield more precise measurements in the coming years.

1 / 2