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Open research questions in Spacecraft Dynamics and Control

52 unresolved questions extracted from the limitations and future-work sections of 136 Spacecraft Dynamics and Control papers in our library. Each links back to the study that raised it.

What the literature leaves open

  • Further development of the antimatter propulsion system. Investigation of the effects of cosmic radiation and micrometeoroid impacts on the spacecraft. Development of advanced AI autonomy and navigation systems.

    A Conceptual Design for Humanity's First Interstellar Journey to Proxima Centauri: My Proposed Methods and Thoughts · 2026 · DOI

  • The high velocity expenditures required for spiral trajectories. The need for optimized thrust direction and gravity assist to reduce the required velocity increment. The effects of planetary perturbations on the trajectories.

    Energetic feasibility of redirecting trans-Neptunian objects onto Mars-impacting orbits: Continuous thrust and gravity assist trajectories · 2026 · DOI

  • Further study of the effects of planetary perturbations on the trajectories. Investigation of the potential for using other gravity assists in the Solar System. Development of more sophisticated models for optimizing thrust direction and gravity assist.

    Energetic feasibility of redirecting trans-Neptunian objects onto Mars-impacting orbits: Continuous thrust and gravity assist trajectories · 2026 · DOI

  • Generating power in areas with limited sunlight. Withstanding bending moments and torsional loads. Mitigating the effects of lunar dust and thermal cycling.

    Landed Vehicle-Derived Lunar Polar Power Mast Systems: Close-Fit Exoskeleton Architecture and Vehicle-Core Utility Integration · 2026 · DOI

  • The singularity of the Kepler problem. The complexity of the bifurcation structure of highly inclined near halo orbits. The need for a numerical framework for the continuation of periodic orbits and the computation of their Floquet multipliers.

    Bifurcations of highly inclined near halo orbits using Moser regularization · 2026 · DOI

  • The technical challenges of implementing the technique. The need for a method to enable repeated close-range observations of the rings. The challenge of maintaining the trajectory inclination with respect to the ring plane as low as possible.

    A Gravity-Assist Technique for Ballistic Trajectories Skimming Over Planetary Ring Systems · 2026 · DOI

  • Future research can focus on comparing the method with other methods. Future research can focus on discussing the computational cost of the method. Future research can focus on extending the method to more complex problems.

    Universal Birkhoff Method for Computing Extremals in the Elliptic Restricted Three-Body Problem · 2026 · DOI

  • The lack of a method that can generate verifiable extremals without any assistance or initialization from dynamical systems theory. The lack of a method that can compute finite-thrust extremal arcs in the elliptic restricted three-body trajectory optimization problem.

    Universal Birkhoff Method for Computing Extremals in the Elliptic Restricted Three-Body Problem · 2026 · DOI

  • The lack of a comprehensive conceptual design for interstellar travel. The need for a cost-effective and resource-efficient mission architecture.

    A Conceptual Design for Humanity's First Interstellar Journey to Proxima Centauri: My Proposed Methods and Thoughts · 2026 · DOI

  • The force balance and thrust model (Equations 39-42) are developed for constant specific impulse conditions, but self-sustaining propulsion systems may operate with variable exhaust velocity and thrust profiles depending on power source availability. The dynamic interaction between time-varying propellant expulsion velocity and spacecraft acceleration requires further modeling.

    Prototyping of self-sustaining propulsion systems for solar system exploration · 2026 · DOI

  • The paper addresses propellant mass ratio optimization to minimize required propellant through multi-stage rocket design, but provides no specific analysis of optimal staging configurations, mass distribution strategies, or structural efficiency factors for self-sustaining propulsion systems operating across multiple solar system destinations.

    Prototyping of self-sustaining propulsion systems for solar system exploration · 2026 · DOI

  • This paper constructs a safe spatiotemporal travel system without superluminal assumptions, centered on geometric topology. By integrating the Nuclear Vortex Layered Spiral Geometry Theorem, the Petal Spacetime Evolution Model, and the Two State Particle Burst Model, it provides a causally self consistent and testable framework covering theory, carrier design, path control, information transmission, and safety mechanisms. Abandoning superluminal paradigms, the system uses active spacetime topological folding and coupling to realize transitions, fundamentally avoiding causal paradoxes and instability. All key parameters are geometrically quantifiable and observable, enabling integration with current precision experiments. The system achieves: 1. Active obstacle avoidance for spatiotemporal paths. 2. Controllable folding of local spacetime. 3. Stable trans spatiotemporal information transmission. 4. Full process causal consistency. It opens a new geometric approach to spacetime control and travel within general relativity. Future work will focus on: 1.Mathematical completeness proofs and invariant characterization of nuclear vortex spiral and petal models; 2.Tabletop microscopic experiments testing spacetime bubble stability and particle two-state phase transitions; 3.Engineering design and parameter optimization of manta-ray carriers and double-heart information channels; 4.Extension to black-hole physics, early universe, and quantum gravity for a unified geometric physical picture. This research provides a rigorous theoretical and technical solution for spatiotemporal travel, and a testable perspective on the essence of spacetime and the geometric origin of gravity, with value in both fundamental theory and frontier exploration.

    Safe Spatiotemporal Travel System Based on Geometric Topology Control · 2026 · DOI

  • Further experimental tests are needed to confirm the results and to apply TDI to different areas of engineering. The development of new mathematical models and computational tools is needed to support the application of TDI.

    Equations of The Theory of Dynamic Interactions: TDI · 2026 · DOI

  • The lack of a law establishing a relationship between orbitation and intrinsic rotation in physics. The need to confirm the formalism of the Newton-Euler equations and to develop a new theory that can explain the relationship between orbitation and intrinsic rotation.

    Equations of The Theory of Dynamic Interactions: TDI · 2026 · DOI

  • Further studies can investigate the effect of departure apogee on other types of Earth--Moon transfers. Future research can explore the application of the study's results to other space missions.

    Effect of Departure Apogee on Δv and Arrival Conditions in Weak-Stability-Boundary Earth--Moon Transfers · 2026 · DOI

  • The need to understand the effect of departure apogee on transfer time and Δv. The lack of studies on the effect of departure apogee on weak-stability-boundary Earth--Moon transfers.

    Effect of Departure Apogee on Δv and Arrival Conditions in Weak-Stability-Boundary Earth--Moon Transfers · 2026 · DOI

  • The paper identifies the need for orbit optimization of LEO electronic reconnaissance constellation.

    An orbit optimization method for low earth orbit electronic reconnaissance constellation · 2026 · DOI

  • The insufficient cognition of the intrinsic elastic nature of space restricts human interstellar travel. Traditional superluminal travel theories have astronomical energy demands.

    Curvature Cannon: A Superluminal Interstellar Navigation Theory Based on SIRIC Spatial Elastodynamics — Physical Principles, Mathematical Derivation, and Experimental Verification · 2026 · DOI

  • The paper suggests the development of advanced interferometric architectures and compact deep-space atomic clocks. The paper proposes the use of time-delay mechanical noise cancellation to improve the accuracy of Doppler tracking.

    Navigation and geodesy in the solar system: current capabilities and future prospects · 2026 · DOI

  • The paper identifies a need for improved accuracy in navigation and geodesy data. The paper highlights the limitations of current radiometric tracking techniques, such as tropospheric fluctuations and antenna mechanical noise.

    Navigation and geodesy in the solar system: current capabilities and future prospects · 2026 · DOI

  • The paper only considers a specific type of spacecraft mission. The approach is limited to a certain range of orbital parameters. The calculation is performed using a simplified model of the spacecraft motion.

    Optimization of the combined launch profile for placing spacecraft into low-inclination orbits · 2026 · DOI

  • Future research should focus on extending the proposed method to more general types of spacecraft missions. The approach could be applied to other types of orbit transfers, such as lunar or interplanetary missions.

    Optimization of the combined launch profile for placing spacecraft into low-inclination orbits · 2026 · DOI

  • There is a need for reliable power systems on the lunar surface. Prior work has not addressed the challenge of generating power in areas with limited sunlight. The proposed system aims to fill this gap.

    Landed Vehicle-Derived Lunar Polar Power Mast Systems: Close-Fit Exoskeleton Architecture and Vehicle-Core Utility Integration · 2026 · DOI

  • Further study of the effects of oblateness and ring perturbations on orbital stability. Application of the CR3BP-based framework to other planetary systems. Development of more advanced models that account for additional perturbations.

    Linear stability and dynamics in the vicinity of oblate celestial bodies and planetary rings · 2026 · DOI

  • The original CR3BP framework does not account for perturbations from planetary rings and oblateness. There is a need for a more accurate model of orbital stability in complex gravitational environments.

    Linear stability and dynamics in the vicinity of oblate celestial bodies and planetary rings · 2026 · DOI

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52 open questions have been extracted from the limitations and future-work passages of 136 Spacecraft Dynamics and Control papers in our library. Each one below links back to the study that raised it, so you can read the original claim in context.

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