The National Aeronautics and Space Administration (NASA) Science MissionDirectorate is releasing a Draft Announcement of Opportunity (AO) for community reviewand comment for the next mission in the Discovery program (NNH10ZDA003J). Discovery Program investigations must address NASAs planetary science goals.Investigations may focus on any body in the Solar System, excluding the Earth and theSun, and including Mars and the Moon. Investigations may not focus on extra-solarplanetary systems.Participation is open to all categories of organizations (U.S.), including educationalinstitutions, industry, not-for-profit organizations, Federally Funded Research andDevelopment Centers (FFRDCs), NASA Centers, the Jet Propulsion Laboratory (JPL), AppliedPhysics Laboratory (APL), and other Government agencies. Upon the release date, the fulltext of the Draft Discovery 2010 AO and all appendices will be available athttp://nspires.nasaprs.com/ . A Potential Bidders Conference will be held in early January 2010 in the Washington, DC,area to provide an overview of the Draft Discovery 2010 AO and to address any questions. Information about the Conference will be made available on the Discovery AcquisitionAdditional Information Page at http://discovery.larc.nasa.gov/ .The issuance of this Draft Discovery 2010 AO does not obligate NASA to issue theDiscovery 2010 AO and solicit proposals. Any costs incurred by prospective investigatorsin preparing submissions in response to this Draft Discovery 2010 AO are incurredcompletely at the submitter's own risk.Send comments to Dr. Michael New; Lead Discovery Program Scientist; Planetary ScienceDivision; Mail Suite 3X63; Science Mission Directorate; National Aeronautics and SpaceAdministration; Washington, DC 20546-0001; TEL: (202) 358-1766; E-mail:[email protected]. Comments are preferred in writing and may be sent by E-mail; thecharacter string "Discovery 2010 Draft AO" (without quotes) should be included in thesubject line of all transmissions. The identity of those submitting comments will beheld in confidence. Answers to questions about this Draft Discovery 2010 AO will be madeavailable on the Discovery Acquisition Additional Information Page athttp://discovery.larc.nasa.gov/ .

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