Long-term and sensitive space-based photometry from the CoRoT, Kepler and TESS satellites has allowed us to finally 'hear' the stars. These remarkable data have yielded accurate measurements of masses, radii and distances for more than 30,000 stars across the Milky Way that have been largely confirmed by the GAIA data release. More profoundly, these observations are revealing the interior stellar conditions, clearly differentiating those stars that are undergoing helium burning in their cores to those that are only burning hydrogen in a shell. Moreover, interior rotation rates for hundreds of stars now test the uncertain physics of how angular momentum is transported within a star and the absence of dipolar modes in many stars may be indicative of strong internal magnetic fields.
