{"knowledge_schema": {"broad_category": "Astronomy \u2192 Exoplanets \u2192 Planetary Temperature", "refinement": "This problem examines the relationship between a star's luminosity and the equilibrium temperature of planets orbiting those stars, considering factors like albedo and distance from the star.", "specific_scope": "The focus is on comparing the equilibrium temperatures of two exoplanets orbiting stars with different luminosities but under similar conditions (same albedo and distance).", "goal": "Determine which planet has a higher equilibrium temperature based on the luminosity of their respective stars."}, "summary": "This problem involves understanding how the luminosity of a star affects the equilibrium temperature of a planet orbiting it. Given that Planet_A orbits a star with twice the luminosity of the star hosting Planet_B, and both planets have the same albedo and are at the same distance from their stars, Planet_A will have a higher equilibrium temperature. This is because a more luminous star provides more energy, leading to a higher temperature for the planet. Thus, the answer is that Planet_A will have a higher equilibrium temperature."}