"Red Giants: Refining Cosmic Distance Measurements"

Astronomers are exploring new methods to measure the expansion of the Universe, aiming to resolve the Hubble tension. A recent paper introduces a technique that utilizes red giant stars at the "Tip-of-the-Red-Giant-Branch" (TRGB) phase, leveraging their brightness fluctuations to improve distance measurements. While this method enhances confidence in expansion measurements, it may not fully resolve the discrepancy in Hubble constant values. Nevertheless, refining these measurements could unveil new insights into the fundamental workings of the Universe.