• Technologies enabling alternatives to Ares V

    • Aerocapture

    • Solar sails

    • Solar-electric propulsion

    • Nuclear-electric propulsion

    • Robotic assembly and servicing

  • Technologies enhancing Constellation capabilities

    • Human assembly and servicing

TABLE 2.2 Correlation of Technology Needs with the Vision Missions Analyzed by the Committee


Basic Enabling Technologies

Technologies Enabling Alternatives to Ares V

Technologies Enhancing Constellation Capabilities

Free-flying Constellations

Tethered Flight

Next Gen DSN

Space Nuclear Reactors, NEP


Solar Sails

Solar/Nuclear Electric Propulsion

Robotic Assembly and Servicing

Human Assembly and Servicing

Advanced Compton Telescope


















Interstellar Probe






Kilometer-Baseline Far-Infrared/ Submillimeter Interferometer
















Neptune Orbiter with Probes






Palmer Quest Mars Mission


















Solar Polar Imager







Stellar Imager









Titan Explorer








NOTE: Basic enabling technologies are those technologies that exist in concept at present but whose development is needed for some of the missions. Technologies enabling alternatives to Ares are those whose availability would provide options for the missions currently conceived as being executed without requiring an Ares V. Human assembly and servicing would enhance the capabilities of these missions. Some of the missions, like the Advanced Compton Telescope, would not directly benefit from these technology developments. DSN, Deep Space Network; LUVO, Large UV/Optical Telescope; MUST, Modern Universe Space Telescope; NEP, nuclear-electric propulsion; SAFIR, Single Aperture Far Infrared Observatory.

aSignificant mission enhancement.

bOnly if solar sail is implemented.

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