https://www.aanda.org/articles/aa/ref/2015/06/aa25687-15/aa25687-15.html
Astronomy & Astrophysics (A&A) is an international journal which publishes papers on all aspects of astronomy and astrophysics
red giant starspotevolutionxxtriangulum
https://www.lex18.com/news/national/a-giant-red-star-is-acting-weird-and-scientists-think-it-may-be-about-to-explode
The star was once the ninth-brightest star in the sky... Now it's ranked at No. 23.
red stargiantscientiststhinkingmight
https://www.space.com/astronomy/black-holes/nasa-exoplanet-hunting-spacecraft-hears-a-red-giant-star-singing-to-its-partner-black-hole
NASA's exoplanet-hunting spacecraft TESS has heard the song a starquaking red giant sings to its partner black hole.
red giant starnasaexoplanethuntingspacecraft