The long-term stability of multi-planet exoplanet systems is poorly constrained.
Resonances and perturbations can destabilize orbits over billions of years. N-body simulations and long-term observation campaigns can test stability.
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Resonances and perturbations can destabilize orbits over billions of years. N-body simulations and long-term observation campaigns can test stability.
Millimeter-sized meteoroids travel at tens of kilometers per second and pose catastrophic puncture risks to satellites and spacecraft hulls. Ultra-sensitive impact sensors and wide-field detection arrays are needed.
Variable space weather causes unpredictable upper atmosphere expansion, creating atmospheric drag that alters satellite orbits without warning. Space situational awareness requires real-time upper-atmosphere mapping.
Objects originating from outside our solar system pass through at extreme hyperbolic velocities with minimal discovery lead-time. High-delta-v interceptor platforms on standby in deep space orbits are required for defense.
Thousands of dead satellites and fragments now circle the planet, and a single collision can create thousands more pieces of debris. Left unmanaged, this could eventually make some orbits too dangerous to use safely.