{"knowledge_schema": {"broad_category": "Astronomy \u2192 Exoplanets \u2192 Atmospheric Composition", "refinement": "This problem involves understanding the relationship between a planet's mass, radius, and its ability to retain an atmosphere.", "specific_scope": "The focus is on comparing different exoplanets based on their mass and radius to determine which is most likely to have a significant atmosphere.", "goal": "Identify the exoplanet that is most likely to possess a substantial atmosphere based on its physical characteristics."}, "summary": "In this problem, we are examining various exoplanets to determine which one is most likely to have a significant atmosphere. The key factors influencing a planet's ability to retain an atmosphere are its mass and radius. Generally, larger and more massive planets can hold onto thicker atmospheres due to stronger gravitational pull. Among the candidates, the planet with 10 Earth masses and 2 Earth radii is the most likely to have a significant atmosphere, as it has the greatest mass and size, which contribute to its atmospheric retention capabilities."}