Anticipated Properties of the Surface and Subsurface

An important issue for the Deep Impact mission is the identification of possible correlations between localized areas (active areas) and jet activity in the inner coma. As an example, the results of such a study for comet 81P Wild 2 have recently been reported by Sekanina et al. (2004). They find that cometary activity can flourish perhaps even in unilluminated regions - already an important result that needs confirmation. in the case of 9P Tempel 1 there are many pieces of evidence suggesting...

Formal Education Products and Programs

Educational units for school-aged children from elementary, middle and high school have been developed. Materials for grades K-4 are called activities. For middle school and high school, we developed educational modules that consist of guides for both students and teachers, and include alignment with science and or math educational standards. All materials can be used in both formal classrooms and informal settings such as community or after school programs. The modules were reviewed by...

Surface Morphology of Comets

Spacecraft imaging during the past decade has documented a wide variety of processes that determine the evolution of asteroid surfaces. As noted by Malin 1985 , comets, thanks to their activity, hold the potential for even greater diversity in terms of surface processes and morphological forms. Although considerable effort has been devoted to modeling the activity of comets, most such models do not address surface processes in a comprehensive manner, nor make specific predictions of surface...