  Asteroseismology involves using the resonant frequencies of a star to infer
details about its internal structure and evolutionary state. Oscillation
frequencies are most useful when accompanied by accurate measurements of the
more traditional stellar parameters such as luminosity and effective
temperature. The Hipparcos catalogue provides luminosities with precisions of a
few percent or better for many oscillating stars. I briefly discuss the
importance of Hipparcos measurements for interpreting asteroseismic data on
three types of oscillating stars: delta Scuti variables, rapidly oscillating Ap
stars and solar-like stars. I also retract the endorsement I made during my
talk of Trimble's (1995) suggestion to change the spelling of
"asteroseismology".

Astrophysics