"Red Giant Stars: A New Measure of Cosmic Expansion"

Astronomers have discovered that the acoustic oscillations of red giant stars at different ages can be used to more precisely measure cosmic distances, potentially offering a solution to the "Hubble tension" problem. This discovery could add a new rung to the cosmic distance ladder, as red giants at a critical point in their evolution can serve as "standard candles" for distance measurements. By distinguishing the ages of red giants, researchers hope to improve the accuracy of the Hubble constant measurement and gain new insights into the fundamental processes shaping the universe's evolution.