Environmental Coherence in Exoplanet Science: Populations, Bias, and Rocky Atmospheres

Exoplanet science now operates across two major observational frontiers: population surveys that catalog thousands of planets, and atmospheric studies that probe the environmental conditions of a small subset of them. These efforts often move in parallel, even though they reflect the same underlying planetary systems. This paper explores environmental coherence as a way of thinking about how these perspectives connect. Coherence here means that population statistics, observational limits, and atmospheric interpretations can be made consistent with one another without exceeding what the data reasonably support. Rather than proposing new physical models, this work highlights how detection bias, atmospheric ambiguity, and environmental interpretation interact — and how recognizing those relationships can help guide cautious, structured inference about habitability and planetary diversity.