Helioseismology has proved to be a very powerful tool in the
study of the Sun. This technique has allowed us to study the
structure and dynamics of the Sun in exquisite detail. The
current focus of the field is to study the changes that take
place in the Sun as the solar activity cycle progresses.
I shall discuss some of the recent results in this field obtained
by the solar physics group at Yale. I shall also discuss how
some of these techniques are being adapted to be able to
study other stars.