... Echoes from the Depths of a Red Giant Star . ... The technique is to time the small variations in a star's brightness measured by the planet hunting Kepler spacecraft. ... As recently discovered in red giant stars , some of the oscillations detected have periods that would cause them to penetrate to the stellar core. ... Publications with keywords: red giant - oscillations - kepler . Publications with words: red giant - oscillations - kepler . ... Kepler 16b: A Planet with Two Suns . ...