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Astronomy

How Baryon Acoustic Oscillations are Imprinted in Galaxy Clustering

Quick fact

The same sound waves that left ripples in the cosmic microwave background also created a subtle 'bump' in the probability of finding two galaxies about 500 million light-years apart—a distance called the baryon acoustic oscillation scale.

Why this is interesting

The universe has a 'cosmic yardstick' hidden in the way galaxies are spread across space. Could the remnants of sound waves from the Big Bang be the key to measuring the cosmos?

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How Baryon Acoustic Oscillations are Imprinted in Galaxy Clustering

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