Tuning Into a Trio of Red Giants

Listen to the rhythms of three red giants in the constellation Draco, as determined by brightness measurements from NASA’s Transiting Exoplanet Survey Satellite. To produce audible tones, astronomers multiplied the oscillation frequencies of the stars by 3 million times. It’s clear that larger stars produce longer, deeper pulsations than smaller ones. Credit: NASA/MIT/TESS and Ethan Kruse (USRA), M. Hon et al., 2021 This video can be freely shared and downloaded at While the video in its entirety can be shared without permission, some individual imagery or sounds may have been obtained through permission and may not be excised or remixed in other products. Specific details on such content may be found here: For more information on NASA’s media guidelines, visit If you liked this video, subscribe to the NASA Goddard YouTube channel: Follow NASA’s Goddard Space F