  The Kepler mission, launched in March 2009, has revolutionized
asteroseismology, providing detailed observations of thousands of stars. This
has allowed in-depth analysis of stars ranging from compact hot subdwarfs to
red giants, and including the detection of solar-like oscillations in hundreds
of stars on or near the main sequence. Here I mainly consider solar-like
oscillations in red giants, where Kepler observations are yielding results of a
perhaps unexpected richness. In addition to giving a brief overview of the
observational and numerical results for these stars, I present a simple
analysis which captures some of the properties of the observed frequencies.
