World Solve

Turbulence, magnetic fields, and feedback from young stars interact in complex ways to set stellar masses and rates. Multi-scale simulations and high-resolution observations with radio and infrared telescopes can help disentangle these effects.

Planets ejected from their systems may roam the galaxy unbound, affecting models of planet formation. Gravitational microlensing campaigns can constrain their population.

Gas, dust, magnetic fields, and cosmic rays interact across scales, but many parameters are poorly measured. Multi-band surveys and simulation campaigns can connect small-scale physics with galactic evolution.

These fields affect cosmic-ray propagation and structure formation but are hard to measure. Faraday rotation surveys and gamma-ray observations can constrain them.

Complex organics exist in clouds, but pathways are unclear. Laboratory astrochemistry and radio observations can reveal reaction networks.

Dust growth, fragmentation, and migration shape planet formation but are complex. Combined observation and modeling efforts are needed.

Astronauts lose up to 1-2% of bone mass per month in microgravity despite daily intensive physical exercise regimes. Artificial gravity habitats or gene-targeted therapeutics are needed to enable multi-year interstellar trips.

Beamed light sails intended for Alpha Centauri must reflect 99.999% of laser light to avoid vaporizing instantly under gigawatt power. Metamaterial reflector sails with ultra-low thermal absorption must be created.

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.

Even our fastest probes would take tens of thousands of years to reach the nearest star system. Without a breakthrough in propulsion, interstellar travel remains purely theoretical.