Vision and Voyages for Planetary Science in the - Solar System ...

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TABLE S.1 Crosscutting Themes, Key Questions and the Missions in the Recommended Plan That Address Them Crosscutting Theme Priority Questions Missions Building New Worlds 1. What were the initial stages and conditions and processes of solar system formation and the nature of the interstellar matter that was incorporated? 2. How did the giant planets and their satellite systems accrete, and is there evidence that they migrated to new orbital positions? 3. What governed the accretion, supply of water, chemistry, and internal differentiation of the inner planets and the evolution of their atmospheres, and what roles did bombardment by large projectiles play? Planetary Habitats 4. What were the primordial sources of organic matter, and where does organic synthesis continue today? Workings of Solar Systems 5. Did Mars or Venus host ancient aqueous environments conducive to early life, and is there evidence that life emerged? 6. Beyond Earth, are there modern habitats elsewhere in the solar system with necessary conditions, organic matter, water, energy, and nutrients to sustain life, and do organisms live there now? 7. How do the giant planets serve as laboratories to understand the Earth, the solar system, and extrasolar planetary systems? 8. What solar system bodies endanger and what mechanisms shield the Earth's biosphere? 9. Can understanding the roles of physics, chemistry, geology, and dynamics in driving planetary atmospheres and climates lead to a better understanding of climate change on Earth? 10. How have the myriad chemical and physical processes that shaped the solar system operated, interacted, and evolved over time? CSSR, Trojan Tour and Rendezvous, Discovery missions JEO, Uranus Orbiter and Probe, Trojan Tour and Rendezvous, Io Observer, Saturn Probe, Enceladus Orbiter Mars Sample Return, Venus In Situ Explorer, Lunar Geophysical Network, Lunar South Pole- Aitken Basin Sample Return, Trojan Tour and Rendezvous, CSSR, Venus Climate Mission, Discovery missions Mars Sample Return, JEO, Uranus Orbiter and Probe, Trojan Tour and Rendezvous, CSSR, Enceladus Orbiter, Discovery missions Mars Sample Return, Venus In Situ Explorer, Venus Climate Mission, Discovery missions Mars Sample Return, JEO, Enceladus Orbiter, Discovery missions JEO, Uranus Orbiter and Probe, Saturn Probe CSSR, Discovery missions Mars Sample Return, JEO, Uranus Orbiter and Probe, Venus In Situ Explorer, Saturn Probe, Venus Climate Mission, Discovery missions All recommended missions PREPUBLICATION COPY—SUBJECT TO FURTHER EDITORIAL CORRECTION S-12
Plausible circumstances could improve the picture presented above. If the mission costs presented above are overestimates, the budget increase required for the recommended program would be correspondingly smaller. Increased funding for planetary exploration could make even more missions possible. If this happened, the committee’s recommended additions to the plans presented above would be, in priority order: 1. An increase in funding for the Discovery program, 2. Another New Frontiers mission, and 3. Either the Enceladus Orbiter or the Venus Climate Mission. It is also possible that the budget picture could turn out to be less favorable than the committee has assumed. This could happen, for example, if the actual budget for solar system exploration is smaller than the projections the committee used. If cuts to the program are necessary, the committee recommends that the first approach should be descoping or delaying Flagship missions. Changes to the New Frontiers or Discovery programs should be considered only if adjustments to Flagship missions cannot solve the problem. And high priority should be placed on preserving funding for research and analysis programs and for technology development. Deferred High-Priority Missions The committee identified a number of additional large missions that are of high scientific value but that are not recommended for the decade 2013-2022 for a variety of reasons. In alphabetical order, these missions are: • Ganymede Orbiter, • Mars Sample Return Lander, • Mars Sample Return Orbiter, • Mars Geophysical Network, • Titan Saturn System Mission, and • Neptune Orbiter and Probe. While these missions are deferred, technology investments must be made in the decade 2013- 2022 to enable them and reduce their costs and risk. In particular, it is important to make significant technology investments in the Mars Sample Return Lander, Mars Sample Return Orbiter, Titan Saturn System Mission, and Neptune System Orbiter and Probe. Launch Vehicle Costs The costs of launch services pose a challenge to NASA’s program of planetary exploration. Launch costs have risen in recent years for a variety of reasons, and launch costs today tend to be a larger fraction of total mission costs than they were in the past. These increases pose a threat to formulating an effective, balanced planetary exploration program. Possible ways to reduce launch costs include dual manifesting (launching more than one spacecraft on a single vehicle), making block buys of launch vehicles, and exploiting technologies that allow use of smaller, less expensive launch vehicles. PREPUBLICATION COPY—SUBJECT TO FURTHER EDITORIAL CORRECTION S-13
Page 1 and 2: PREPUBLICATION COPY Subject to Furt
Page 3 and 4: The National Academy of Sciences is
Page 5 and 6: COMMITTEE ON THE PLANETARY SCIENCE
Page 7 and 8: STAFF DAVID H. SMITH, Senior Progra
Page 9 and 10: Preface Strategic planning activiti
Page 11 and 12: statement of task’s call for “i
Page 13 and 14: Understand the Processes That Contr
Page 15 and 16: Executive Summary In recent years,
Page 17 and 18: however, that the Discovery program
Page 19 and 20: • Jupiter Europa Orbiter (descope
Page 21 and 22: TABLE ES.2 Medium Class Missions—
Page 23 and 24: Summary This report was requested b
Page 25 and 26: • Recent volcanic activity on Ven
Page 27 and 28: Mission Study Process and Technical
Page 29 and 30: Near the end of the past decade, NA
Page 31 and 32: • Mars Astrobiology Explorer-Cach
Page 33: development, and descoped or cancel
Page 37 and 38: Data Distribution and Archiving Dat
Page 39 and 40: Sample curation facilities are crit
Page 41 and 42: consider making equivalent systems
Page 43 and 44: committee concluded that for the mo
Page 45 and 46: alanced ground-based solar astronom
Page 47 and 48: 1 Introduction to Planetary Science
Page 49 and 50: THE 2002 SOLAR SYSTEM EXPLORATION D
Page 51 and 52: Medium The first decadal survey ide
Page 53 and 54: FIGURE 1.6 Victoria crater as image
Page 55 and 56: FIGURE 1.8 The mirror for the Large
Page 57 and 58: FIGURE 1.10 From a comet, to the de
Page 59 and 60: • The committee’s programmatic
Page 61 and 62: • Opportunities for joint venture
Page 63 and 64: FIGURE 1.14 Schematic showing the f
Page 65 and 66: 2 National and International Progra
Page 67 and 68: FIGURE 2.3 Sand dunes on Mars photo
Page 69 and 70: NASA’s Earth Science Division Pla
Page 71 and 72: More recently, among the goals of t
Page 73 and 74: FIGURE 2.6 A natural bridge on the
Page 75 and 76: investigations should still be deve
Page 77 and 78: FIGURE 2.10 The surface of Titan as
Page 79 and 80: 3 Shared objectives that incorporat
Page 81 and 82: 3 Priority Questions in Planetary S
Page 83 and 84: • How have the myriad chemical an
Page 85 and 86:
How Did the Giant Planets and Their
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heavy bombardment? Clues to address
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Did Mars or Venus Host Ancient Aque
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We lack critical geophysical data a
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detected in time. The report conclu
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How Have the Myriad of Chemical and
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13. P.R. Estrada, I. Mosqueira, J.J
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51. M.J. Mumma, G.L. Villanueva, R.
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4 The Primitive Bodies: Building Bl
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FIGURE 4.1 Asteroids and comet nucl
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• How do the compositions of pres
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Future Directions for Investigation
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Astrobiology is the study of the or
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Important Questions Some important
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observations of the outer parts of
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Sample Curation and Laboratory Faci
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In the previous decadal survey, CCS
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asteroid (either ice-rock or metal-
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hazard. Asteroid 433 Eros, one of t
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BOX 4.1 The Discovery Program, Vita
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ody exploration can be achieved by
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34. H.H. Hsieh and D. Jewitt. 2006.
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FIGURE 5.1 Mercury, Venus, and the
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Constrain the Bulk Composition of t
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from Venus Express and Galileo may
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• Understand the composition and
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• Is there evidence of environmen
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Important Questions Some important
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timescales, including the possible
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that may have fostered life, there
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• Venus In Situ Explorer • Sout
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FIGURE 5.3 Venus’s climate is con
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Important scientific objectives tha
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BOX 5.1 Planetary Roadmaps Roadmaps
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4. D.J. Lawrence, W.C. Feldman, J.O
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6 Mars: Evolution of an Earth-like
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BOX 6.1 Mars Science Laboratory Sch
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live there now?”—both key compo
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characteristics (water, gradients i
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availability, physicochemical facto
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UNDERSTAND THE PROCESSES AND HISTOR
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FIGURE 6.4 Examples of recent clima
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particularly the polar-layered depo
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FIGURE 6.6 Geologic time sequence o
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planets and for understanding subse
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experiments, compounded by the unce
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Curation Martian samples require sc
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particle sizes, wavelength ranges,
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environmental conditions including
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Mars Polar Climate Mission As a fol
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R.E. Arvidson, C.C. Allen, D.J. Des
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27. J. Grotzinger, J.F. Bell III, W
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B.M. Jakosky and R.J. Phillips. 200
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72. White papers received by decada
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(MRR-SAG). Posted by the Mars Explo
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the solar system formed. Understand
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FIGURE 7.2 Left: This Hubble image
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temperatures, helium is enhanced in
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FIGURE 7.4 The intrinsic specific l
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Investigate the Chemistry of Giant
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Jupiters seen around other stars in
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• What causes the enormous differ
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FIGURE 7.5 Top: This composite comp
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EXPLORING THE GIANT PLANET’S ROLE
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destroy areas of land equivalent to
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• Assess tidal evolution within g
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• What processes drive the visibl
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esolution visible and near-infrared
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INTERCONNECTIONS Links to Other Par
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SUPPORTING RESEARCH AND RELATED ACT
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FIGURE 7.10 Our atmosphere blocks l
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Cassini Solstice Mission ADVANCING
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8. Determine the composition, struc
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Summary To achieve the primary goal
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Outer Solar System; William B. McKi
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Page 239 and 240:
Page 241 and 242:
TABLE 8.1 Characteristics of the La
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organisms live there now?” Titan
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• Why are Titan and Callisto appa
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Callisto but unlike Ganymede. This
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valuable window into solar system h
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FIGURE 8.6 Multiple jets, dominated
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FIGURE 8.8 Schematic of the complex
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orbits of Io and Europa), and poten
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Cassini has revealed that most of t
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satellite interiors should include
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hardened technology for Io and Gany
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FIGURE 8.11 After a comprehensive t
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FIGURE 8.12 Galileo color image of
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Titan Saturn System Mission Many Ti
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1. What is the nature of Enceladus
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the majority of the Jupiter Europa
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7. O. Mousis, J.I. Lunine, M. Pasek
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45. K.K. Khurana, M.G. Kivelson, K.
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9 Recommended Flight Investigations
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All of the recommendations below ar
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As discussed in more detail below,
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• Ensure that there are adequate
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TABLE 9.2 Discovery Program Mission
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overarching questions in Chapter 3.
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These five were selected from the s
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The Mars community, in their inputs
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should immediately undertake an eff
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(a) (b) FIGURE 9.1 Notional funding
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As noted, the recommended and cost-
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described above are the existing De
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The projected need decreased from 2
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partnership with the Department of
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10 Planetary Science Research and I
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Through the direct involvement of s
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Theoretical development and numeric
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Defining the Need Jon Miller, in hi
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efforts, can help assure compatibil
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history. And telescopic observation
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Hubble Space Telescope Hubble obser
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Although Ka-band downlink has a cle
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and Planetary Institute. Currently,
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the Green Bank Telescope (GBT), and
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up observations. Likewise, monitori
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11 The Role of Technology Developme
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particular technology item. In gene
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The Requirement for Power Of all th
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proposals and populated by technolo
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TABLE 11.1 Summary of Types of Miss
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Solar System Access and Other Core
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influence on the planetary science
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A Letter of Request and Statement o
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latter topics are treated in the NR
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main findings and recommendations s
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TABLE B.1 Institutional Distributio
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M. Gudipati, Laboratory Studies for
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Scott A. Sandford, The Comet Coma R
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C Cost and Technical Evaluation of
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were all full mission studies selec
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Schedule To aid in the assessment o
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FIGURE C.3 Complexity Based Risk As
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Lunar Lander Network⎯Four Landers
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Caching Mars Rover Mars Astrobiolog
Page 370 and 371:
Mars Sample Return Lander and Mars
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Flagship‐class Europa Orbiter SOU
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Saturn Atmospheric Entry Probe SOUR
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Enceladus Orbiter Spacecraft SOURCE
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Uranus Orbiter with Entry Probe SOU
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SUMMARY Linked technical, cost, and
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Overview The purpose of this rapid
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Conclusions Based on analyses of th
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Technology development was found to
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• Characterize the local meteorol
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• Characterize Ganymede’s uniqu
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landing in the small southern lakes
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atmospheric probe and another a sep
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FIGURE E.1 Projected budget for the
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Biosphere: The life zone of Earth o
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EPOXI: The name of the extended mis
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Late heavy bombardment: A postulate
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Nili Fossae region: A fracture in t
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Protoplanet: A planet in the proces
Page 408 and 409:
Stardust: A spacecraft launched in
Page 410:
G Mission and Technology Study Repo
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