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Appendix A Statement of Task The Space Studies ~ oard will conduct ~ study to Top ~ science strategy for solar system exploration. The study will survey He stay of knowledge Ad Den lay out ~e most impor~t scientific questions facing plenary science today. Key areas will influx small bodies, primitive bodies including ~e trms-Neptune realm, the major plumed, the moons of Be outer solar system' md the ironer planets. Because of id rich scientific incrust Ad programmatic prominence, ~e exploration of Mars will receive individual Mention. The science stringy will contain the following key component: I. A big picture of solar system exploration what it is' how it fits into other scientific endeavors' Ad why it is ~ compelling god today; 2. A broad survey of ~e current ~~ of Knowlton about our solar system today; 3. An invmfory of the top-leve1 scientific questions that should provi~ the focus for solar system exploration today; md 4. A prioritized list of the most promising avenues for flight investigations Ad supporting ground-based activities. In the special cam of Mars, the Board will incorporate the findings of id parallel scientific review of Mars science priorities md implications for NASA,s Mars exploration program (Assessment of Mars Scions ~d Meow Pr~or`~' N~iona1 Academy Press-prepublic~ion text, 2001~. The Mars Exploration program element addressed in the earlier study should be ~~d ~ ~ singe component in ~e new survey rather than attempting to reprioritize individual nearer-~rm (c2007) Mars missions against other solar system exploration mission c~di- da~s. Mars science' however, should ~ well integrated win the broker sci~tif'~ goals. In presenting them prioritize objectives, it would be mod useful to provide prioritized lids of missions are too large to be undertaken within Be Discovery program (i.e.' life cycle Gosh exceeding $300 million} md could be expend to go into implementation during the next decade. These lists should be broken down into small number of cost categories (e.g.' <:$325 million' $325 million to $~50 million' md :~$~50 million}. For objectives ~~ could likely be met within or below Be Discovery eost-eaps' on the over h~d, Be most valuable guidance would take the form of prioritized science goals. The report should separate the presentation of speeif~e implementation recommendations from Be science discussion. Mars missions should be prioritized separably from non-Mars missions. ~5

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APPENDIZA In conduct of the study' the scientific community will be as broadly car~assed as possible given the time available. The findings of ~ number of r=ent Space Studies Board report on focused topics in solar system exploration will also be incorporated in the study.