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  • Lunar Samples
    is regolith material produced by meteorite bombardment with the lunar surface 10002 10010 10084 10085 10086 12001 12003 12003 12023 12024 12029 12030 12032 12033 12037 12041 12042 12044 12057 12060 12070 14003 14141 14148 14149 14156 14163 14240 14259 14260 14425 15012 15013 15014 15017 15020 15030 15040 15071 15081 15091 15100 15201 15211 15221 15231 15241 15251 15261 15271 15291 15301 15311 15401 15410 15420 15425 15431 15471 15501 15507 15511 15531 15601 60050 60500 60600 61140 61160 61181 61221 61240 61281 61500 62231 62281 63320 63501 64420 64501 64801 65501 65701 65901 66031 66041 66081 67031 67461 67481 67601 67701 67941 68121 68501 68821 68841 69921 70011 70050 70060 70161 70170 70180 70181 70271 70311 71041 71131 71500 72131 72141 72150 72161 72221 72270 72320 72431 72441 72501 72701 73121 73131 73151 73211 73221 74111 74121 74220 74241 74250 75061 75081 75111 75121 76031 76121 76131 76221 76240 76321 76330 76501 77210 77531 78121 78221 78231 78250 78421 78440 78460 78480 78501 79121 79170 79221 79240 79260 Luna 16 Core Luna 20 Core Luna21020 Luna24170 Luna 24 Core CORE There is a total of 54 feet of core samples collected from the top of the lunar regolith 10004 10005 12026 12027 12028 14210 14211 14220 14230 15007 15009 15010 60010 60014 64002 68001 68002 69001 70009 70012 73001 74002 76001 79002 A15 Drill A16 Drill A17 Drill Drill Core Drive Tubes Hardware Luna 16 Core Luna 20 Core Luna 24 Core SCR These samples were used for depth profile studies of cosmic ray produced nuclides 10017 12002 12054 14310 64455 68815 74275 79215 A15 Drill THIN SECTIONS These samples are the ones included in the Educational Petrographic Thin Section Sets 12002 12005 14305 15299 60025 65015 70017 70180 72275 74220 75061 75081 78235 DISPLAY About 70 lunar samples are on public display around the world including 10017 10020 10045 10047 10057 10072 12006 12018 12022 12047 12053 12055 12065 14305 14310 14311 14321 15015 15016 15058 15075 15459 15499 15555 15616 60015 60016 60025 61016 66075 67016 67455 67915 70017 70035 70215 72275 74255 75015 76015 76055 77035 79155 APOLLO11 These samples were collected during the Apollo 11 mission 10002 10003 10004 10005 10009 10010 10017 10018 10019 10020 10021 10022 10023 10024 10025 10026 10027 10028 10029 10031 10032 10044 10045 10046 10047 10048 10049 10050 10056 10057 10058 10059 10060 10061 10062 10063 10064 10065 10066 10067 10068 10069 10070 10071 10072 10073 10074 10075 10082 10084 10085 10086 10091 10092 10093 10094 APOLLO12 These samples were collected during the Apollo 12 mission 12001 12002 12003 12003 12004 12005 12006 12007 12008 12009 12010 12011 12012 12013 12014 12015 12016 12017 12018 12019 12020 12021 12022 12023 12024 12026 12027 12028 12029 12030 12031 12032 12033 12034 12035 12036 12037 12038 12039 12040 12041 12042 12043 12044 12045 12046 12047 12051 12052 12053 12054 12055 12056 12057 12060 12061 12062 12063 12064 12065 12070 12072 12073 12075 12076 12077 APOLLO14 These samples were collected during the Apollo 14 mission 14003 14006 14041 14042 14045 14047 14049 14051 14053 14055 14056 14057 14059 14060 14061 14063 14064 14066 14068 14069 14070 14071 14072 14073 14074 14076 14077 14078 14079 14082 14083 14141 14148 14149 14156 14163 14168 14169 14170 14171 14172 14173 14174 14175 14179 14181 14210 14211 14220 14230 14240 14255 14259 14260 14264 14265 14267 14268 14269 14270 14271 14272 14273 14274 14275 14276 14277 14278 14280 14281 14301 14303 14304 14305 14306 14307 14309 14310 14311 14312 14313 14314 14315 14316 14317 14318 14319 14320 14321 14425 APOLLO15 These samples were collected during the Apollo 15 mission 15007 15009 15010 15012 15013 15014 15015 15016 15017 15020 15025 15027 15028 15030 15040 15058 15059 15065 15071 15075 15076 15081 15085 15086 15091 15095 15100 15105 15115 15116 15117 15118 15119 15125 15201 15205 15206 15211 15221 15231 15241 15245 15251 15255 15256 15257 15261 15265 15266 15267 15271 15285 15286 15287 15288 15289 15291 15295 15297 15298 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    Original URL path: http://www.lpi.usra.edu/lunar/samples/ (2016-02-15)
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  • Lunar Images
    of Lunar Surface Flyovers provides a series of digital movies that allow viewers to fly over the dramatic terrain of the lunar surface The spectacular landscapes revealed in this atlas provide scientists with another tool to study the geology of the lunar surface They also provide mission planners with another tool to select landing sites and design robotic and crew traverses This is a living atlas As new spacecraft missions generate additional flyovers those digital movies will be added to the collection LPI Clementine Mapping Project The LPI Clementine Mapping Project is an on line tool for users wanting to generate maps of the lunar surface and its composition using data from the Clementine mission The Clementine mission 1994 was a technology demonstration mission that produced nearly 1 million ultraviolet to visible wavelength UVVIS images over 600 000 high resolution CCD images over 300 000 near infrared images and additional topographic details of the lunar surface This tool seamlessly combines the data so that users can generate their own image mosaics chemical maps and topographic maps of any region on the lunar surface Lunar Atlases The Lunar Orbiter Photo Gallery is an extensive collection of over 2 600 high and moderate resolution photographs produced by all five of the Lunar Orbiter missions These photographs were taken in 1966 1967 to survey possible lunar landing sites and provide baseline imagery for geologic analysis of the lunar surface The images were used to select the Apollo landing sites and to produce many of our existing lunar geologic maps This photo gallery is the web s most comprehensive collection of Lunar Orbiter photographs and supporting mission documents Digital Lunar Orbiter Photographic Atlas of the Moon by Bowker and Hughes NASA SP 206 is considered the definitive reference manual to the global photographic coverage of the Moon The images contained within the atlas are excellent for studying lunar morphology because they were obtained at low to moderate Sun angles The digital Lunar Orbiter Atlas of the Moon is a reproduction of the 675 plates contained in Bowker and Hughes The digital archive however offers many improvements upon its original hardbound predecessor Multiple search capabilities were added to the database to expedite locating images and features of interest For accuracy and usability surface feature information has been updated and improved Finally to aid in feature identification a companion image containing feature annotation has been included The symbols on the annotated overlays however should only be used as locators and not for precise measurements More detailed information about the digital archive process can be read in abstracts presented at the 30th and 31st Lunar and Planetary Science Conferences The Consolidated Lunar Atlas by Gerald P Kuiper Ewen A Whitaker Robert G Strom John W Fountain and Stephen M Larson is a collection of the best photographic images of the Moon These digital renditions were created and edited by Eric J Douglass The Apollo Image Atlas is a comprehensive collection of Apollo Saturn mission photography Included are

    Original URL path: http://www.lpi.usra.edu/lunar/lunar_images/ (2016-02-15)
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  • Lunar Surface
    Catalog 1993 J C Graf NASA Reference Publication 1265 Front Matter Apollo 11 soils Apollo 12 soils Apollo 14 soils Apollo 15 soils Luna 24 soils Apollo 16 soils Apollo 17 soils Bibliography To download complete volume 117 MB click here Trafficability of Lunar Microrovers Part 1 1994 W David Carrier III 11 pages Trafficability of Lunar Microrovers Part 2 1995 W David Carrier III 19 pages Trafficability of Lunar Microrovers Part 3 1996 W David Carrier III 16 pages Geotechnical Properties of Lunar Soil 2005 W David Carrier III 24 pages Lunar Soil Simulation and Trafficability Parameters 2006 W David Carrier III 17 pages Crater Slopes and Regolith Surface Roughness 2006 Brief summary of slopes and surface roughness that characterize the lunar regolith 32 pages Parameters of Lunar Soils 2006 Brief summary of the physical properties of lunar soils 29 pages X ray ultra micrographs of soil agglutinates and impact melt spherules in Apollo sample 10084 C J Kiely and C Kiely Lehigh University Chemical Compositions A good summary of previous results is Chemistry which is Chapter 8 of the Lunar Sourcebook 1991 More recent results can be found using LPI s Abstract Search engine Impact Craters Ballistics of the Copernican Ray System 1960 A classic and hard to find paper about secondary cratering E M Shoemaker 16 pages Mare Exemplum 1960s A film showing the impact cratered evolution of the lunar surface Film A 125 NASA Ames Research Center A good summary of previous results is Lunar Surface Processes which is Chapter 4 of the Lunar Sourcebook 1991 More recent results can be found using LPI s Abstract Search engine Another excellent source of information is Don Wilhelm s The Geologic History of the Moon USGS Professional Paper 1348 Apollo Over the Moon A View From Orbit 1978 NASA SP 362 H Masursky G W Colton and F El Baz eds 266 pages Lunar Impact Crater Database 2015 Losiak et al LPI Lunar Exploration Intern Program 2009 Revised by T Öhman LPI 2011 and 2015 Volcanic Terrains A good summary of previous results is Lunar Surface Processes which is Chapter 4 of the Lunar Sourcebook 1991 More recent results can be found using LPI s Abstract Search engine Another excellent source of information is Don Wilhelm s The Geologic History of the Moon USGS Professional Paper 1348 Apollo Over the Moon A View From Orbit 1978 NASA SP 362 H Masursky G W Colton and F El Baz eds 266 pages Atlas of Lunar Sinuous Rilles 2014 Preliminary Science Reports Apollo Apollo 11 Preliminary Science Report 1969 NASA SP 214 Apollo 12 Preliminary Science Report 1970 NASA SP 235 Apollo 14 Preliminary Science Report 1971 NASA SP 272 Post Apollo Lunar Science Report of a Study by the Lunar Science Institute 1972 Recommendations for post Apollo lunar science activities by many of the participants that planned and executed the Apollo lunar surface science investigations Apollo 15 Preliminary Science Report 1972 NASA SP 289 Apollo 16 Preliminary Science Report

    Original URL path: http://www.lpi.usra.edu/lunar/surface/ (2016-02-15)
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  • Lunar Meteorites
    equatorial region of the Moon so they sampled a relatively small area All of the sample sites outline only 4 to 5 of the lunar surface Thus there is much more exploration to be done After Apollo it was realized that impact events on the lunar surface eject material into space that falls to Earth as meteorites Dozens of lunar meteorites have now been found These are essentially free planetary samples because nature has delivered them to Earth without the cost of a spacecraft mission These are invaluable samples because they represent a much broader region of the lunar surface Indeed they are launched from all areas of the Moon including the far side of the Moon which lies hidden from our view Although we can use chemical fingerprints to identify the approximate source region of the meteorites we are unable unfortunately to precisely locate their launch sites For that reason the samples are without geologic context and some scientifically useful information is missing Nonetheless these samples have proved to be a spectacular asset to our studies of the origin and evolution of the Moon Two good summaries of lunar meteorites have been assembled The first is by Professor Randy

    Original URL path: http://www.lpi.usra.edu/lunar/meteorites/ (2016-02-15)
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  • Moon 101
    time cataclysm periodicity correlation with terrestrial record and other planets Lesson presented July 2 2008 Lesson published July 9 2008 Duration 58 minutes 40 seconds The Lunar Surface The fourth presentation in the Moon 101 series Dr Jeff Plescia discusses dust rocks slopes trafficability geotechnical properties formation and evolution of regolith interface with bedrock crater size frequency distributions exotic components highland mare mixing vertical and lateral transport of material chemical and mineral composition physical state properties and surface characteristics Lesson presented July 16 2008 Lesson produced July 23 2008 Duration 49 minutes 27 seconds The Lunar Crust Dr Gary Lofgren discusses the current understanding of the crust of the Moon The presentation begins with a brief overview of the Moon s surface and discusses the prevailing Magma Ocean Theory resulting in the formation of the primary or original lunar crust The crust was subsequently modified by impact bombardment and volcanic activity Compositional variations in the lunar crust are then described as three major terrains Procellarum KREEP terrain Feldspathic Highlands terrain and the South Pole Aitken basin terrain It is noted that studying rock samples is the key to understanding the lunar crust The presentation then focuses on the characteristics and ages of the major rock types found on the Moon basaltic rocks from mare lava flows anorthositic rocks in the lunar highlands impact breccias and melt rocks and volcanic glasses The lecture concludes with a brief review of the rock sampling conducted during the Apollo missions and lessons learned for future lunar surface exploration Lesson presented 07 30 2008 Lesson produced 08 21 2008 Duration 54 minutes 11 seconds The Lunar Interior In the sixth presentation of the Moon 101 lecture series Dr Jeff Plescia discusses the current understanding of the interior of the Moon The presentation begins with a brief overview of the Moon from a geophysical perspective and discusses the prevailing Giant impact Theory and Magma Ocean Theory resulting in the formation of the Moon and its differentiation into crust mantle and core The presentation then focuses on the current understanding of the chemistry mineralogy and thickness of the lunar crust the boundaries depth and mineralogy of the mantle and the size and composition of the lunar core Geophysical parameters of the Moon are then discussed including the seismic nature of the Moon including shallow deep and thermal moonquakes and impact events the lunar gravity field magnetism and heat flow Lesson presented 08 13 2008 Lesson produced 08 20 2008 Duration 1 hour 30 seconds The Lunar Polar Environment In the seventh presentation of the Moon 101 lecture series Dr Ben Bussey discusses the current understanding of the polar regions of the Moon The presentation begins with a brief overview of the geometry of the Moon s axis of rotation with respect to the ecliptic plane the resulting polar environment on the lunar surface and the proposition that a polar region particularly the south pole would be a good location for a lunar outpost Using imagery data from

    Original URL path: http://www.lpi.usra.edu/lunar/moon101/ (2016-02-15)
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  • Exploration Strategies
    Carpenter et al 19 pages European Space Agency Exploration Strategy ESA Strategic Framework for Human Exploration 2013 Briefing by B Hufenbach 5 pages Exploring Together ESA Space Exploration Strategy 2015 Advisory Group Reports NASA Advisory Council NAC Recommendations from the Workshop on Science Associated with the Lunar Exploration Architecture 2007 H H Schmitt et al see also White Papers presented at the workshop National Research Council NRC Human Exploration of Space A Review of NASA s 90 Day Study and Alternatives 1990 New Frontiers in the Solar System An Integrated Exploration Strategy 2003 Stepping Stones to the Future of Space Exploration A Workshop Report 2004 NASA In Situ Resource Utilization ISRU Capability Roadmap Final Report 2005 Sanders G B and Duke M eds Unpublished white paper 49 pages In Situ Resource Utilization ISRU Capability Roadmap Progress Review 2005 Final Presentation to the National Research Council NRC Powerpoint presentation 204 charts The Scientific Context for Exploration of the Moon 2007 NASA s Strategic Direction and the Need for a National Consensus 2012 Lunar Exploration Analysis Group LEAG Click here for LEAG Reports Lunar Exploration Science Working Group LExSWG A Planetary Science Strategy for the Moon 1992 Lunar Surface Exploration Strategy 1995 Curation and Analysis Planning Team for Extraterrestrial Materials CAPTEM Analysis of Lunar Sample Mass Capability for the Lunar Exploration Architecture 2007 International Lunar Exploration Working Group ILEWG Beatenberg Declaration 2004 Cape Canaveral Lunar Declaration 2008 International Space Exploration Coordination Group ISECG Global Exploration Roadmap GER 2011 The Global Exploration Roadmap 2011 By B Hufenbach et al IAC 11 B3 1 8 10 pages ISECG Mission Scenarios and their Role in Informing Next Steps for Human Exploration Beyond Low Earth Orbit 2011 By C Culbert et al IAC 11 D3 1 2 18 pages The Global Exploration Roadmap 2013 NP 2013 06 945 HQ 50 pages Benefits Stemming from Space Exploration 2013 International Academy of Astronautics IAA The Next Steps in Exploring Deep Space 2004 Planetary Society Extending Human Presence into the Solar System An Independent Study for The Planetary Society on Strategy for the Proposed U S Space Exploration Policy 2004 Other Reports Issues and Opportunities Regarding the U S Space Program A Summary Report of a Workshop on National Space Policy 2004 Report of the Commission on the Scientific Case for Human Space Exploration 2005 Royal Astronomical Society 27 pages Space Exploration Review 2009 British National Space Centre 125 pages Science Objectives Report of the Ad Hoc Working Group on Apollo Experiments and Training on the Scientific Aspects of the Apollo Program 1963 The Sonett Report final edition 101 pages Horizons and Opportunities in Lunar Sample Science 1985 Lunar and Planetary Sample Team LAPST Unmanned Spaceflights Needed as Scientific Preparation for a Manned Lunar Base 1985 in Lunar Bases D E Wilhelms 7 pages The Scientific Context for Exploration of the Moon Final Report 2007 Committee on the Scientific Context for Exploration of the Moon National Research Council Lunar Surface Exploration Strategy 1995 Lunar Exploration Objectives 2006 Produced by NASA s Global Exploration Strategy process Exploration Objectives Post Apollo Lunar Science Report of a Study by the Lunar Science Institute 1972 Recommendations for post Apollo lunar science activities by many of the participants that planned and executed the Apollo lunar surface science investigations Status and Future of Lunar Geoscience NASA SP 484 1986 Future Astronomical Observatories on the Moon 1988 NASA Conference Publication 2489 Lunar Exploration Objectives 2006 Produced by NASA s Global Exploration Strategy process Voyages Charting the Course for Sustainable Human Space Exploration 2011 NASA NP 2011 06 395 LaRC John Olson Douglas Craig and others 36 pages Utilizing Lunar Resources Lunar Bases and Space Activities of the 21st Century 1985 W W Mendell ed 865 pages Report of the In Situ Resources Utilization Workshop 1988 NASA Conference Publication 3017 100 pages Workshop on Production and Uses of Simulated Lunar Materials 1991 NASA In Situ Resource Utilization ISRU Capability Roadmap Final Report 2005 Sanders G B and Duke M eds Unpublished white paper 49 pages In Situ Resource Utilization ISRU Capability Roadmap Progress Review 2005 Final Presentation to the National Research Council NRC Powerpoint presentation 204 charts Lunar Analog Terrains and Astronaut Training Report of the Ad Hoc Working Group on Apollo Experiments and Training on the Scientific Aspects of the Apollo Program 1963 The Sonett Report final edition 101 pages section about training a Scientist Astronaut begins on p 52 The U S Geological Survey Branch of Astrogeology A Chronology of Activities from Conception through the End of Project Apollo 1960 1973 Early Apollo Investigation Field Test 5 October 4 7 1965 Hopi Buttes Arizona 1965 USGS Technical Letter J W M Gonigle P G Ables and R D Regan 83 pages Apollo Applications Program Field Test 5 at Hopi Buttes Arizona 1967 USGS Technical Letter G A Swann N G Bailey and R D Regan 19 pages Astronaut s Guide to Terrestrial Impact Craters 1988 R A F Grieve et al LPI Technical Report Number 88 03 92 p JSC 1 A New Lunar Soil Simulant 1994 Lunar Regolith Simulant Materials Workshop 2005 Guidebook to the Geology of Barringer Meteorite Crater Arizona a k a Meteor Crater 2007 David A Kring 150 pages Black Point Lava Flow Arizona Lunar Mission Test Site 2008 2010 NASA s Analog Missions Paving the Way for Space Exploration 2011 NASA NP 2011 06 395 LaRC John Olson Douglas Craig and others 66 pages Science Training History of the Apollo Astronauts 2015 William C Phinney NASA SP 2015 626 318 pages Robotic Exploration Selected Missions Lunar Reconnaissance Orbiter LRO Lunar CRater Observation and Sensing Satellite LCROSS Summary Report on Lunar Survey Probe Utilization Study 1967 NASA CR 89537 JPL760 12 15 pages Contributions of a Lunar Geoscience Observer LGO Mission to Fundamental Questions in Lunar Science 1986 Results Proceedings of the Lunar Rover Mobility Systems Workshop 1992 Data Collection by Robotic Precursors in Support of Project Apollo 1992 Data Requirements Program Review and Evaluation of Results Dean Eppler Lifetimes of

    Original URL path: http://www.lpi.usra.edu/lunar/strategies/ (2016-02-15)
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  • Constellation Hardware
    and science mission concept with the Orion Multi Purpose Crew Vehicle and a teleoperated lander rover 2013 Burns et al 15 pages Orion Quick Facts 2011 NASA Factsheet FS 2011 12 058 JSC 2 pages Orion Quick Facts 2014 NASA Factsheet FS 2014 08 004 JSC 2 pages Orion Spacecraft Overview 2012 NASA Factsheet FS 2012 03 012A JSC 2 pages Orion Multi Purpose Crew Vehicle Desk Model 2014 Paper cut out model that can be assembled to produce the Orion vehicle Orion Launch Abort System 2014 NASA Factsheet FS 2014 06 220 LaRC 4 pages The Orion spacecraft was launched for the first time on a Delta IV rocket in December 2014 in a mission called Exploration Flight Test One or EFT 1 The vehicle orbited the Earth twice was propelled to an altitude about 15 times higher than the International Space Station and then re entered the Earth s atmosphere at 80 of the speed of a spacecraft returning from the Moon The test was designed to test the atmospheric re entry and recovery capabilities of the spacecraft The test was successful Orion Exploration Flight Test 1 2012 NASA Factsheet FS 2012 05 018 JSC 2 pages Orion First Flight Test 2014 NASA Factsheet FS 2014 08 005 JSC 2 pages Orion Exploration Flight Test 1 Sequence of Events 2014 NASA Infographic 1 page Orion Flight Test Press Kit 2014 NP 2014 11 020 JSC 32 pages After EFT 1 the next Orion launch is scheduled for 2017 or 2018 Exploration Mission 1 EM 1 will stack Orion on the new Space Launch System SLS and propel Orion in an orbit around the Moon before returning to Earth The Orion will be attached to a service module provided by the European Space Agency ESA as shown to the right Exploration Mission 2 EM 2 is scheduled to occur in 2021 and for the first time will carry crew As with EM 1 EM 2 will orbit the Moon carrying astronauts to within 100 km of the lunar surface Ares V Cargo Launch Vehicle Ares V was a two stage rocket designed to be the heavy lifter of NASA s new space transportation system For lunar exploration activities it would have carried the Earth Departure Stage EDS which would have contained a Lunar Surface Access Module LSAM Once in Earth orbit the Earth Departure Stage would have docked with the Orion Crew Vehicle delivered by Ares I described above The EDS would have propelled the crew and their lunar lander to the Moon Once in lunar orbit the EDS would have been jettisoned Additional details are available in a brief factsheet and on the Ares V website Space Launch System SLS for Cargo and Crew As the lunar exploration program evolved modifications to the Ares V launch concept were made The revised vehicle has the generic name Space Launch System or SLS Unlike the Ares V however the SLS will also have the capacity to carry the Orion crew

    Original URL path: http://www.lpi.usra.edu/lunar/constellation/ (2016-02-15)
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  • Landing Site Studies
    J Moore et al 209 pages Advanced Geologic Exploration Supported by a Lunar Base A Traverse Across the Imbrium Procellarum Region of the Moon 1985 i n Lunar Bases M J Cintala et al 15 pages Unmanned Spaceflights Needed as Scientific Preparation for a Manned Lunar Base 1985 in Lunar Bases D E Wilhelms 7 pages The Case for Planetary Sample Return Missions Origin and Evolution of the Moon and its Environment 1989 G Ryder P D Spudis and G J Taylor Eos Transactions American Geophysical Union vol 47 pages 1495 and 1505 1509 Spreadsheet with potential landing sites and science goals A Site Selection Strategy for a Lunar Outpost Science and Operational Parameters 1990 Developing A Site Selection Strategy for a Lunar Outpost Science Criteria for Site Selection 1990 Results Proceedings of the Lunar Rover Mobility Systems Workshop 1992 There s Iron in Them Thar Hills A Geologic Look at the Aristarchus Plateau as a Potential Landing Site for Human Lunar Return 1996 NASA CR 202008 vol 1 sec 9 1 C R Coombs and D S McKay 19 pages The Lunar Surface Reference Mission A Description of Human and Robotic Surface Activities 2003 Duke M Hoffman S and Snook K NASA Technical Publication 2003 210793 NASA Lyndon B Johnson Space Center Houston TX Apollo Traverses and Summary of Science Discoveries 2006 Brief summary of the Apollo traverses science objectives and science results 39 pages Landing Site Study of Schrödinger Basin 2011 K M O Sullivan T Kohout K G Thaisen and D A Kring 2011 Calibrating several key lunar stratigraphic units representing 4 billion years of lunar history within Schrödinger Basin In Recent Advances in Lunar Stratigraphy D A Williams and W Ambrose eds pp 117 128 Geological Society of America Special Paper 477 Boulder CO Bunte M

    Original URL path: http://www.lpi.usra.edu/lunar/site_studies/ (2016-02-15)
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