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Science Overview: Solar/Interplanetary Activity within CISM Solar outputs drive space weather through the particles and fields of the extended solar atmosphere (solar wind), and by direct radiation. The key solar/interplanetary parameters are the solar wind velocity, density, and vector magnetic field at Earth, and the radiation at wavelengths shortward of the ultraviolet. The Solar/Interplanetary Node of CISM addresses both scientific and practical questions: How does the Sun control space weather? How can we maximize the lead-time for forecasting? The planned modeling employs a comprehensive set of observations for both boundary conditions and model validation. Major tools and strategies to be used are described here, together with some expected results and products for technology and education applications. The primary observational constraints include Solar photospheric magnetic fields Solar ultraviolet to x-ray emissions Solar white light images Interplanetary measurements of particles and fields upstream of Earth Our current models include Global coronal models Coronal Transient (CME) models Active region models Solar wind models Models of CMEs in the Solar Wind Model interfaces/couplings occur between different scales of solar and coronal models, between solar and interplanetary models, and between solar and interplanetary models, and magnetosphere and upper atmosphere models. Data integration/Model validation is an inseparable part of our planned modeling activity. An example of an event analysis best illustrates this point. May 1997 Period Node "products" are coordinated with NOAA SEC needs Those involved include computational physicists, experimenters, data analysts, applications providers. Responsible members of each participating institution will bring others into the Center collaboration, including local colleagues, students, and support staff.