Abstract Icy moons with subsurface oceans of liquid water rank among the most promising astrobiological targets in our Solar System. In this work, we assess the feasibility of deploying laser sail technology in precursor life-detection missions. We investigate such laser sail missions to Enceladus and Europa, as these two moons emit plumes that seem accessible to in situ sampling. Our study suggests that GigaWatt laser technology could accelerate a 100 kg probe to a speed of 30 km s 1 , thereupon reaching Europa on timescales of 1–4 years and Enceladus with flight times of 3–6 years. Although the ideal latitudes for the laser array vary, placing the requisite infrastructure close to either the Antarctic or Arctic Circles might represent technically viable options for an Enceladus mission. Crucially, we determine that the minimum encounter velocities with these moons (about 6 km s 1 ) may be near-optimal for detecting biomolecular building blocks (e.g., amino acids) in the plumes by means of a mass spectrometer akin to the Surface Dust Analyzer onboard the Europa Clipper mission. In summary, icy moons in the Solar System are potentially well-suited for exploration via the laser sail architecture approach, especially where low encounter speeds and/or multiple missions are desirable.

    Highlights Light sail astrobiology mission architecture to analyze Enceladus and Europa formulated. GigaWatt laser technology capable of achieving flight times of 6 years. Encounter velocities with plumes of icy moons compatible with optimal detection of biomolecules. Potential of light sail flotillas for Solar System exploration discussed.


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    Title :

    A light sail astrobiology precursor mission to Enceladus and Europa


    Contributors:

    Published in:

    Acta Astronautica ; 218 ; 251-268


    Publication date :

    2024-02-26


    Size :

    18 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




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