The Sun and stars rotate in different ways and at different rates of velocity and knowledge of
how they rotate is important in understanding the formation and evolution of stars and their
structure. The wide variety of stars offers an equally wide variety of rotation rates and
rotational evolution. From the slowly rotating stars to stars rotating close to their breakup
velocities different techniques and models have to be developed to study rotation and its
effects on physical aspects of stars. In fact one currently witnesses a complete renewal of
astrophysical ideas about stellar rotation mainly due to the development of new models
including high-order effects of rotation and magnetism. This book while not attempting to
answer all questions about rotation given that many issues still have to be further
investigated focuses on the basics and some particular aspects while aiming to show why it is
important from a physical point of view to study stellar rotation. Based on courses given at
a graduate school these tutorial lectures will be of interest and useful to a rather broad
audience of scientists and students. TOC:The Sun: a Slowly Rotating Star.- What's Coming:
Issues Raised From Observation of the Shape of the Sun.- Effects of Rotation on Stellar P-Mode
Frequencies.- Approaching the Low-Frequency Spectrum of Rotating Stars.- The Rotation of the
Solar Core.- Physics of Rotation in Stellar Models.- Long Baseline Interferometry of Rotating
Stars Across the HR Diagram: Flattening Gravity Darkening Differential Rotation.- Is the
Critical Rotation of Be Stars Really Critical for the Be Phenomena?- On the Rotation of A-type
Stars.- The Solar Magnetic Field: Surface and Upper Layers Network and Internetwork Field.
