The rotation of a star and the revolutions of its planets are not necessarily aligned. This
article reviews the measurement techniques, key findings, and theoretical interpretations …

The Sun and other stars are magnetic: magnetism pervades their interiors and affects their
evolution in a variety of ways. In the Sun, both the fields themselves and their influence on …

The coronal activity–rotation relationship is considered to be a proxy for the underlying
stellar dynamo responsible for magnetic activity in solar and late-type stars. While this has …

Data from the Global Oscillation Network Group (GONG) project and other helioseismic
experiments provide a test for models of stellar interiors and for the thermodynamic and …

The splitting of the frequencies of the global resonant acoustic modes of the Sun by large-
scale flows and rotation permits study of the variation of angular velocity Ω with both radius …

Oscillations detected on the solar surface provide a unique opportunity for investigations of
the interior properties of a star. Through major observational efforts, including extensive …

Until the last few decades, investigations of stellar interiors had been restricted to theoretical
studies only constrained by observations of their global properties and external …

Helioseismology has allowed us to study the structure of the Sun in unprecedented detail.
One of the triumphs of the theory of stellar evolution was that helioseismic studies had …

This article surveys the development of observational understanding of the interior rotation
of the Sun and its temporal variation over approximately forty years, starting with the 1960s …

The operation of the solar global dynamo appears to involve many dynamical elements,
including the generation of fields by the intense turbulence of the deep convection zone, the …