A light sail astrobiology precursor mission to Enceladus and Europa

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 $\sim 30\mathrm{km}{\mathrm{s}}^{-1}$, 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 $6\mathrm{km}{\mathrm{s}}^{-1}$) 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 \emph{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.

accepted for publication in Acta Astronautica; 22 pages; 15 figures; 3 tables

References in corpus (15)

• Probing for Evidence of Plumes on Europa with HST/STIS
• The New Horizons Pluto Kuiper belt Mission: An Overview with Historical Context
• Oxidation Processes Diversify the Metabolic Menu on Enceladus
• The interaction of relativistic spacecrafts with the interstellar medium
• Polymerization of building blocks of life on Europa and other icy moons
• Electromagnetic forces on a relativistic spacecraft in the interstellar medium
• A Search for Water Vapor Plumes on Europa using SOFIA
• Low-cost precursor of an interstellar mission
• In-situ detection of Europa's water plumes is harder than previously thought
• Can Planet Nine Be Detected Gravitationally by a Sub-Relativistic Spacecraft?
• AttoSats: ChipSats, other Gram-Scale Spacecraft, and Beyond
• Exploration of the outer solar system with fast and small sailcraft
• Optimal mass and speed for interstellar flyby with directed-energy propulsion
• Project Lyra: The Way to Go and the Launcher to Get There
• Intermediate Points for Missions to Interstellar Objects Using Optimum Interplanetary Trajectory Software