Photon Sails
Laser-pushed sails can theoretically reach very high fractions of light speed for tiny probes, with enormous beam and pointing challenges.
Future propulsion
Near-light-speed travel is a frontier physics and energy problem, not a near-term product. AeroVectrix presents it as speculative research literacy.
Laser-pushed sails can theoretically reach very high fractions of light speed for tiny probes, with enormous beam and pointing challenges.
Fusion propulsion could raise exhaust velocity, but controlled compact fusion propulsion remains undeployed.
Extreme energy density, but production, storage, safety, and cost are far beyond practical propulsion use.