{"knowledge_schema": {"broad_category": "Physics \u2192 Relativity \u2192 Reference Frames", "refinement": "This problem involves understanding the concept of relative motion between two inertial frames of reference: the ejecta from a supernova and the center of the Galaxy.", "specific_scope": "The focus is on calculating the distance traveled by the ejecta in the Galaxy's reference frame over a specific time interval, taking into account the relative velocity between the two frames.", "goal": "Determine the distance the ejecta travels in the Galaxy's reference frame during a time period of 50 seconds as measured in the ejecta's frame."}, "summary": "This problem is rooted in the principles of physics, specifically in the area of relativity and reference frames. It describes a scenario where a supernova ejecta is moving towards the center of the Galaxy, and we need to calculate the distance it travels in the Galaxy's reference frame over a time interval of 50 seconds. By applying the concept of relative motion and using the given speed of 60,000 km/s, we can determine the distance traveled, which is found to be 3,060,000 km."}