Tim Bedding has played a leading role in establishing the field of asteroseismology, the study of stellar oscillations. This involves using the natural oscillation frequencies of stars to probe their interiors. He pioneered the detection of stellar oscillations with ground-based telescopes, including using the Anglo-Australian Telescope to make the first clear detections of oscillations in Sun-like stars. Bedding led the application of asteroseismology to red giant stars using NASA's Kepler Mission. In particular, he showed how to use a specific class of oscillations (so-called gravity modes) to reveal which red giants have started to burn helium deep within their cores.