Solar Gravitational Lens Mission Propulsion Trade-offs Analyzed for 2035-2040 Launch

The paper explores propulsion options for a Solar Gravitational Lens (SGL) mission, which aims to image exoplanets using the Sun's gravity as a lens. The analysis compares solar sailing, nuclear electric propulsion (NEP), and hybrid approaches. Reaching the target distance of 650-900 AU within a reasonable timeframe (20 years) presents a significant propulsion challenge. Solar sailing requires extremely low areal density sails and close solar approaches, posing survivability concerns. NEP, while more mature, struggles to achieve sub-20-year transit times without aggressive technology assumptions. Hybrid architectures, combining an initial high-velocity injection with NEP cruise, offer a promising compromise. The study identifies specific technology readiness levels and system-level demonstrations needed by the early 2030s to enable a 2035-2040 launch. The trade-offs between different propulsion systems highlight the need for continued investment in advanced propulsion technologies for deep-space exploration. The mission's success hinges on achieving significant improvements in solar sail performance, NEP specific mass, or both.

*Transparency Footnote: The AI model's analysis is based on publicly available scientific research. No proprietary data or confidential information was used. The analysis aims to provide an objective assessment of the findings presented in the source document.*

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