CURATED BLOCKED QUESTION

Direct imaging of an exoplanet's surface

Resolving surface features on a planet around another star is well-posed and uncontroversially desirable. It is blocked by angular resolution: separating surface detail at interstellar distance needs apertures or interferometric baselines far beyond anything built or funded. No idea is missing; the instrument is.

blocked by

instrumentation

This is a sourced, human-curated entry or a declared project limitation. It is not a computed discovery or an actionable hypothesis.