space-30-exam-07. Explain (Physics only) Distinguish planets from moons by what they orbit for stable circular orbit diagram. Use scale focus words: distance size universe galaxy solar stellar planetary cosmological hierarchy scale.

space-30-exam-07: A strong answer says that (Physics only) Distinguish planets from moons by what they orbit in Our Solar System. For stable circular orbit diagram, name the relevant object, stage, motion or evidence and connect it to the learning objective. In orbital motion, gravity supplies the centripetal force, so the object keeps changing direction while remaining in a stable path around the body it orbits. Finish by separating the idea from a misconception such as planet versus star, moon versus satellite, orbit versus rotation, or galaxy versus universe.

This exam response follows a precise chain: identify the Space Physics context, explain the mechanism or evidence, and protect the concept boundary. The scale focus makes this item distinct while anchored to Our Solar System.