World Solve

Current models rely on limited spectra from a small subset of planets, often with degeneracies in composition and cloud structure. High-resolution time-resolved spectroscopy and improved atmospheric retrieval algorithms are needed.

Kepler and other missions have identified thousands of exoplanets, but we lack robust statistics on Earth-size worlds with stable climates and liquid water. Next-generation transit and direct-imaging missions must refine occurrence rates.

Observed exoplanet diversity challenges simple core-accretion models. High-resolution imaging of disks and improved simulations are needed.

Resonances and perturbations can destabilize orbits over billions of years. N-body simulations and long-term observation campaigns can test stability.

Identifying traces of methane, ozone, and water vapor simultaneously on rocky extrasolar planets remains at the limit of current telescopes. Space-based starshades and high-contrast coronagraphs are needed to resolve atmospheric details.

A host star is millions to billions of times brighter than a reflecting planet, blinding optical telescopes. Next-generation space interferometers and giant optical starshades are required to resolve exoplanet oceans and continents.

Detecting a planet in a habitable zone is only a first step, and current tools can't yet confirm whether conditions there truly support advanced life. Refining this picture would sharpen the search for life beyond Earth.

We've confirmed thousands of exoplanets, but identifying which ones could truly support life requires data we mostly don't have yet. A clearer count would refocus the search for life beyond Earth.

Right now we can only detect exoplanets indirectly, through shadows and wobbles in starlight. Direct imaging would let us actually study alien landscapes and atmospheres instead of just inferring their existence.