Multispacecraft Studies and Simulations of Heliospheric Structure and
Dynamics

Aaron Roberts

More than a dozen spacecraft have informed us about the structure and
dynamics of the heliosphere on a wide range of temporal and spatial scales.
Complementing this, MHD simulations can provide closure on mechanisms to
explain the data as well as global pictures to complement local
observations.  This talk will review our recent progress, focusing on issues
such as the structure of the heliospheric current sheet; the possible
topological importance of planar magnetic structures and associated magnetic
holes; the paths of heliospheric field lines; and the evolution of
turbulence.  Novel visualization methods allow us to see the solar wind
structures with unprecedented clarity.