How the songs of stars can help perfect Gaia's sweeping map of our galaxy 

 By listening to "music" played by shaking stars, astronomers could use asteroseismology as a new type of cosmic distance ruler, perfecting the 3D map of two billion stars being built by Gaia. 

https://cdn.mos.cms.futurecdn.net/LMZbVTveQUFgy3iaB8HMQH.jpg

https://www.space.com/gaia-satellite-stars-music-distance-measurements-asteroseismology